Power Integrated Circuits

Power IC Selection Guides

Display Drivers and Other Power ICs — Automotive Grade Part Number Maximum Output Voltage (V) Description Maximum Output Current (mA) Number of Outputs Sink/Source Latched Serial In Packages A6260 40 Constant current LED driver 350 1 Source - constant current No No SOIC-8 exposed pad A6810 60 VF display driver 25 10 Source Yes Yes DIP-18, SOIC-20, PLCC-20 A6812 60 VF display driver 25 20 Source Yes Yes SOIC-28, PLCC-28 A6818 60 VF display driver 25 32 Source Yes Yes PLCC-44 A6850 40 Two-channel sensor interface IC 25 2 Source No No SOIC-8 A2550 60 Relay driver / Vreg 250 3×Relay 1×5 V Vreg Sink No No eTSSOP-16 A2557 60 Relay/solenoid driver/LED 300 4 Sink No No DIP-16, SOIC-16, PLCC-28 UDx2559 60 Relay/solenoid driver/LED 600 4 Sink No No DIP-16, SOIC-16, PLCC-28 A3942 60 Four channel high-side MOSFET pre-driver IC - 4 - - Yes TSSOP-38

Power Management ICs — Automotive Grade Part Number Description Input Voltage Number of Outputs Output Ratings Package Key Features A4401 Flyback converter / VF power supply IC 7 V to 40 V Single Single pre-driver output for external pass element SOIC-8 Adaptive quasi-resonant flyback converter for low EMI A8450 Multi-Output Regulator 6 V to 45 V Quad 1.2 V to 3.3 V @ 200 mA 3.3 V@ 200 mA 5 V@ 200 mA 5 V@ 200 mA SOIC-24 Internal buck regulator with two linear regulators (5 V tracking) and two linear controllers (3.3 V and 1.8 V to 3.3 V adjustable), 135°C operation, fault flag

DC Brush and Bipolar Stepper Motor Drivers — Automotive Grade Part Number Output Voltage Range Output Current Number of Bridges Output Interface Logic Supply Voltage Range Motor Type Packages Key Features A3940 7 V to 40 V n/a Single full MOSFET gate driver Parallel Internally generated DC brush SOIC-28, eTSSOP-28 Automotive temperature, charge pump for low battery operation, fault output A3941 7 V to 50 V n/a Single full MOSFET gate driver Parallel Internally generated DC brush eTSSOP-28 Automotive temperatures, automotive diagnostics, small outline thermally enhanced package A4940 7 V to 50 V n/a Single full MOSFET gate driver Parallel 3.0 V to 5.5 V DC brush eTSSOP-24 Automotive temperatures, small outline thermally enhanced package, independent control of MOSFETs A3946 7 V to 60 V n/a Half bridge MOSFET gate driver Parallel Internally generated DC brush SOIC-16, eTSSOP-16 Automotive temperature, charge pump for low battery operation, fault output, 60 V operation A3980 7 V to 50 V 1 A Dual full DMOS Parallel (Translator) 3 V to 5.5 V MicroStepper (up to 16 steps/full step) eTSSOP-28 Protected output drivers, two-wire (step/DIR) interface, fault reporting UDQ2916 10 V to 45 V 750 mA Dual full Bipolar Parallel 4.75 V to 5.25 V Stepper DIP-24, SOIC-24, PLCC-44 Internal PWM current control, 2-bit DAC SPF7302 7 V to 36 V 6 A Single full DMOS Parallel Internally generated DC brush HSOP-16 Automotive grade, complete protections with fault signal, two-wire interface

Three-Phase Brushless DC Motor Drivers — Automotive Grade Part Number Output Voltage Range Output Current Number of Bridges Output Interface Logic Supply Voltage Range Motor Type Packages Key Features A3930 7 V to 50 V n/a Three half bridges DMOS Hall-based state machine Internally generated Three-phase brushless eLQFP-48 Hall commutation logic, sleep, SR, MD, brake, tach, PWM, fault output A3931 7 V to 50 V n/a Three half bridges DMOS Hall-based state machine Internally generated Three-phase brushless eLQFP-48 Hall commutation logic, sleep, SR, MD, brake, tach, PWM, fault output, prepositioning state A3935 7 V to 40 V n/a Three half bridges DMOS Parallel 4.75 V to 5.25 V Three-phase brushless QSOP-36, eLQFP-48 Automotive temperature, boost converter for low battery operation, fault output A4935 7 V to 50 V n/a Three half bridges DMOS Parallel 3.0  V to 5.5 V Three-phase brushless eLQFP-48 Automotive temperatures, automotive diagnostics, integrated charge pump

Part Number Maximum Output Current (mA) Maximum Output Voltage (V) Number of Outputs Latched Output Serial Input Packages Features A6282 50 13 16 Yes Yes QFN-24, SOIC-24, TSSOP-24 CC, TSD, UVLO A6285 80 13 16 Yes Yes QFN-32 CC, DotC, SOTO, TSD, UVLO A6275 90 17 8 Yes Yes DIP-16, SOIC-18 CC, UVLO A6276 90 17 16 Yes Yes DIP-24, SOIC-24, eTSSOP-24 CC, UVLO A6278 90 17 8 Yes Yes DIP-16, SOIC-18, eTSSOP-16 CC, LOD, SOTO, TSD, UVLO A6279 90 17 16 Yes Yes DIP-24, SOIC-24, eTSSOP-24, QFN-28 CC, LOD, SOTO, TSD, UVLO A6833 100 30 32 Yes Yes PLCC-44   A6832 100 40 32 Yes Yes PLCC-44   A6280 150 17 3 Yes Yes DIP-16, QFN-16 CC, DotC, PWM, TSD, UVLO A6281 150 17 3 Yes Yes QFN-16 CC, DotC, PWM, TSD, UVLO, internal PWM clock A6277 150 24 8 Yes Yes DIP-20, SOIC-20 CC, UVLO, high/low brightness control pin A6B595 150 50 8 Yes Yes DIP-20, SOIC-20 -40 to +125°C temp range available A6260 350 (more if current-limit switch is bypassed) 39 1 No No SOIC-8 Thermal foldback, reverse battery protection, enabled input for PWM, slew-rate limiting A6821 350 50 8 Yes Yes DIP-16, SOIC-16   A2982 350 50 8 No No DIP-18, SOIC-20   UDx2559 600 60 4 No No DIP-16, PLCC-28, SOIC-16 -40 to +125°C temp range available

Driver and controller ICs are also produced by Allegro for fractional horsepower dc, stepper and brushless dc motors in the industrial and automotive markets. BCD technology gives Allegro an advantage in higher power applications and allows expansion in existing markets and associated applications such as large tape drives, automotive blowers, power steering motors, and factory automation.

Brushless DC Motor Drivers Part Number Output Voltage Range Output Current Number of Bridges Output Interface Logic Supply Voltage Range Motor Type Packages Key Features A3904 2.4  V to 5.5 V 127 mA One linear sink driver Linear MOSFET I²C Internally generated Voice coil DFN-6, Bare die, WLCSP-6 8 bit D to A, 1 × 0.7 WLCSP, internal sense resistor A4930 8 V to 36 V 1 to 10 A Typ Single full bridge MOSFET gate driver Parallel Internally generated Single-phase BLDC fan 5 × 5 DFN-28 Dead time protection, FG, RD outputs, lock protection, soft start, Hall element input, PWM current limit A4931 8  V to 38  V 1 to 10 A Typ Three half bridges MOSFET gate driver Parallel Internally generated Three-phase brushless 5 × 5 DFN-28 PWM current limit, FG out, Hall element input, locked rotor protection, UVLO, TSD A3932 12 V to 50 V 2 to 25 A Typ Three half bridge gate drivers MOSFET gate driver Parallel Internally generated Three-phase brushless TSSOP-38 SR, tach, fault output, power MOSFET protection, brake, PWM A3936 9 V to 50 V 3 A Three half bridges DMOS Parallel 3 V to 5.5 V Three-phase brushless PLCC-44 Half-commutation logic, sleep, SR, MD, brake, tach, PWM A3938 12 V to 50 V 2 to 25 A Typ Three half bridge gate drivers MOSFET gate driver Parallel Internally generated Three-phase brushless TSSOP-38 SR, fault output, power MOSFET protection, power loss brake, PWM A8904 4 V to 14 V 1.2 A Three half bridges DMOS Serial 4.5 V to 5.5 V Three-phase brushless SOIC-24, eTSSOP-28 Sensorless commutation, FLL speed control, linear current control

DC Brush and Bipolar Stepper Motor Drivers Part Number Output Voltage Range Output Current Number of Bridges Output Interface Logic Supply Voltage Range Motor Type Packages Key Features A3949 8 V to 36 V 2.8 A Single full DMOS Parallel Internally generated DC brush SOIC-16, eTSSOP-16 Sleep, internally generated logic supply A3950 8 V to 36 V 2.8 A Single full DMOS Parallel Internally generated DC brush eTSSOP-16, QFN-16 OCP, fault output, sleep, internally generated logic supply A3953 Vcc to 50 V 1.3 A Single full Bipolar Parallel 3 V to 5.5 V DC brush DIP-16, SOIC-16 Sleep, fast/slow decay, brake, Satlington® sink outputs, PWM A3955 Vcc to 50 V 1.5 A Single full Bipolar Parallel 4.5 V to 5.5 V MicroStepper (up to 8 steps/full step) DIP-16, SOIC-16 3-bit DAC, MD, Satlington® sink outputs, PWM A3959 9.5 V to 50 V 3 A Single full DMOS Parallel 4.5 V to 5.5 V DC brush DIP-24, SOIC-24, eTSSOP-28 Slow/fast/mixed decay, SR, sleep, brake, PWM A3964 5 V to 30 V 800 mA Dual full Bipolar Parallel 4.75 V to 5.25 V Stepper DIP-24, SOIC-24 2.5 V reference, PWM A3966 Vcc to 30 V 650 mA Dual full Bipolar Parallel 4.75 V to 5.5 V Stepper SOIC-16 Full, half, Satlington® sink outputs, PWM A3967 4.75 V to 30 V 750 mA Dual full Bipolar Parallel (Translator) 3 V to 5.5 V MicroStepper (up to 8 steps/full step) SOIC-24 Two-wire (Step/DIR) interface, MD, sleep, Satlington® sink outputs, PWM A3968 Vcc to 30 V 650 mA Dual full Bipolar Parallel 4.75 V to 5.5 V DC brush SOIC-16 Brake function, Satlington® sink outputs, PWM A3969 5 V to 30 V 650 mA Dual full Bipolar Parallel 3 V to 3.6 V Stepper QFN-28 Full, half, Satlington® sink outputs, PWM A3972 15 V to 50 V 1.5 A Dual full DMOS Serial 4.5 V to 5.5 V MicroStepper (up to 32 steps/full step) DIP-24 6-bit DAC, SPI, SR, MD, DT, sleep, PWM A3973 15 V to 35 V 1 A Dual full DMOS Serial 4.5 V to 5.5 V MicroStepper (up to 32 steps/full step) DIP-24, SOIC-24 6-bit DAC, MD, SPI, SR, sleep, PWM A3974 15 V to 50 V 1.5 A Dual full DMOS Serial 4.5 V to 5.5 V DC brush PLCC-44 MD, sleep, SPI, SR, brake function A3977 8 V to 35 V 2.5 A Dual full DMOS Parallel (Translator) 3 V to 5.5 V MicroStepper (up to 8 steps/full step) PLCC-44, eTSSOP-28 Two-wire (step/DIR) interface, MD, sleep, SR, PWM A3979 8 V to 35 V 2.5 A Dual full DMOS Parallel (Translator) 3 V to 5.5 V MicroStepper (up to 16 steps/full step) eTSSOP-28 Two-wire (step/DIR) interface, MD, sleep, SR, PWM A3982 8 V to 35 V 1.5 A Dual full DMOS Parallel (Translator) 3 V to 5.5 V Stepper full/half step SOIC-24 Two-wire (step/DIR) interface, MD, sleep, SR, PWM, 2 A peak A3983 8 V to 35 V 1.5 A Dual full DMOS Parallel (Translator) 3 V to 5.5 V MicroStepper (up to 8 steps/full step) eTSSOP-24 Two-wire (step/DIR) interface, MD, sleep, SR, PWM, 2.5 A peak A3984 8 V to 35 V 1.5 A Dual full DMOS Parallel (Translator) 3 V to 5.5 V MicroStepper (up to 16 steps/full step) eTSSOP-24 Two-wire (step/DIR) interface, MD, sleep, SR, PWM, 2 A peak A3985 12 V to 50 V 2 A to 10 A Typ External dual full MOSFET gate driver Serial 3 V to 5.5 V MicroStepper (up to 32 steps/full step) TSSOP-38 Serial interface, sleep, 6-bit linear DACs, PWM, SR, MD A3986 12 V to 50 V 2 A to 10 A Typ External dual full MOSFET gate driver Parallel (Translator) 3 V to 5.5 V MicroStepper (up to 16 steps/full step) TSSOP-38 Two-wire (Step/Dir) interface, sleep, DAC, PWM, SR, MD A3987 8 V to 50 V 1.5 A Dual full DMOS Parallel (Translator) 3 V to 5.5 V MicroStepper (up to 16 steps/full step) eTSSOP-24 Two-wire (Step/Dir) interface, MD, sleep, SR, PWM, OCP A3988 8 V to 36 V 1.2 A Quad full DMOS Parallel 3 V to 5.5 V MicroStepper (up to 4 steps/full step) QFN-36, eLQFP-48 2-bit DAC, MD, PWM, drop-in (not pin to pin) for two L6218 (A2916) A3989 8 V to 36 V 1.2 A  (step), 2.4 A  (DC) Three full DMOS Parallel 3 V to 5.5 V MicroStepper and DC Brush (up to 4 steps/full step) QFN-36 2-bit DAC, MD, PWM, drop-in (not pin to pin) for two L6218 (A2916), brake, fast/slow decay A3992 15 V to 50 V 1.5 A Dual full DMOS Serial 4.5 V to 5.5 V MicroStepper (up to 32 steps/full step) DIP-24, eTSSOP-24 6-bit DAC, MD, SPI, SR, sleep, PWM, OCP UDx2916 10 V to 45 V 750 mA Dual full Bipolar Parallel 4.75 V to 5.25 V MicroStepper (up to 4 steps/full step) DIP-34, SOIC-24, PLCC-44 Internal PWM current control, 2-bit DAC L6219 10 V to 45 V 750 mA Dual full Bipolar Parallel 4.75 V to 5.25 V MicroStepper (up to 4 steps/full step) DIP-34, SOIC-24, PLCC-44 Internal PWM current control, 2-bit DAC A3901 2.5 V to 5.5 V 400 mA Dual full MOSFET Parallel Internally generated Stepper or DC brush DFN-10 Full, half, brake, sleep, 3×3×0.75 mm DFN A3903 2.5 V to 5.5 V 500 mA Single full MOSFET Parallel Internally generated DC brush DFN-8 Forward, reverse, brake, standby, linear voltage control 2.0 × 2.0 × 0.55 mm DFN A3906 2.4 V to 9 V 1 A Dual full MOSFET Parallel Internally generated Stepper or DC brush QFN-20 Full, half, brake, sleep, UVLO, low RDS(on), internal PWM current control, peak current flag outputs, SR A3904 2.4 V to 5.5 V 127 mA Voice coil driver MOSFET I2C 1.8 V to 5.5 V Voice coil DFN-6, Wafer, WLCSP 8-bit DAC, 500 µA resolution, small package footprint, sleep A3995 8 V to 36 V 2.4 A Dual full DMOS Parallel 3 V to 5.5 V DC brush QFN-36 Brake, fast/slow decay, SR, PWM A4983 8 V to 35 V 2  A Dual full DMOS Parallel (Translator) 3 V to 5.5 V MicroStepper (up to 16 steps/full step) QFN-28 Two-wire (step/DIR) interface, MD, sleep, SR, PWM, 2 A peak

DC Brush and Bipolar Stepper Motor Drivers — Automotive Grad Part Number Output Voltage Range Output Current Number of Bridges Output Interface Logic Supply Voltage Range Motor Type Packages Key Features A3941 7 V to 50 V n/a Single full MOSFET gate driver Parallel Internally generated DC brush eTSSOP-28 Automotive temperatures, automotive diagnostics, small outline thermally enhanced package A4940 7 V to 50 V n/a Single full MOSFET gate driver Parallel 3.0 V to 5.5 V DC brush eTSSOP-24 Automotive temperatures, small outline thermally enhanced package, independent control of MOSFETs A3946 7 V to 60 V n/a Half bridge MOSFET gate driver Parallel Internally generated DC brush SOIC-16, eTSSOP-16 Automotive temperature, charge pump for low battery operation, fault output, 60 V operation A3980 7 V to 50 V 1 A Dual full DMOS Parallel (Translator) 3 V to 5.5 V MicroStepper (up to 16 steps/full step) eTSSOP-28 Protected output drivers, two-wire (step/DIR) interface, fault reporting UDQ2916 10 V to 45 V 750 mA Dual full Bipolar Parallel 4.75 V to 5.25 V Stepper DIP-24, SOIC-24, PLCC-44 Internal PWM current control, 2-bit DAC SPF7302 7 V to 36 V 6 A Single full DMOS Parallel Internally generated DC brush HSOP-16 Automotive grade, complete protections with fault signal, two-wire interface

Three-Phase Brushless DC Motor Drivers — Automotive Grade Part Number Output Voltage Range Output Current Number of Bridges Output Interface Logic Supply Voltage Range Motor Type Packages Key Features A3930 7 V to 50 V n/a Three half bridges MOSFET Gate Driver Hall-based state machine Internally generated Three-phase brushless eLQFP-48 Hall commutation logic, sleep, SR, MD, brake, tach, PWM, fault output A3931 7 V to 50 V n/a Three half bridges MOSFET Gate Driver Hall-based state machine Internally generated Three-phase brushless eLQFP-48 Hall commutation logic, sleep, SR, MD, brake, tach, PWM, fault output, prepositioning state A3935 7 V to 40 V n/a Three half bridges MOSFET Gate Driver Parallel 4.75 V to 5.25 V Three-phase brushless QSOP-36, eLQFP-48 Automotive temperature, boost converter for low battery operation, fault output A4935 7 V to 50 V n/a Three half bridges MOSFET Gate Driver Parallel 3.0 V to 5.25 V Three-phase brushless eLQFP-48 Automotive temperatures, Automotive diagnostics, Integrated charge pump

Part Number Maximum Output Voltage (V) Maximum Output Current (mA) Number of Outputs Sink/Source Latched Output Serial-In Packages Features A2557 60 300 4 Sink No No DIP-16, SOIC-16, PLCC-28   A6B595 50 150 8 Sink Yes Yes DIP-20, SOIC-20   A6800 50 350 4 Sink Yes No DIP-14, SOIC-14 Clamped diodes A6801 50 350 8 Sink Yes No DIP-22, SOIC-24, PLCC-28 Clamped diodes A6841 50 350 8 Sink Yes Yes DIP-18, SOIC-20 Clamped diodes A2987-6 35 350 8 Source No No DIP-20, SOIC-20 Clamped diodes, current limit, TSD A2981 50 350 8 Source No No DIP-18 Clamped diodes A2982 50 350 8 Source No No DIP-18, SOIC-20 Clamped diodes UDx2559 60 600 4 Sink No No DIP-16, PLCC-28, SOIC-16 -40 to +125°C temp range available

Part Number Sensor Type Reduced Sensitivity Timer Horn Pattern Supply Voltage (VDC) Reverse Battery Protection Temperature Range (°C) Package(s) Features A5348 Ion Yes Continuous Pulsing 6 V to 12 V Yes -10 to 60 DIP-16   A5349 Ion Yes Continuous Pulsing 6 V to 12 V — -10 to 60 DIP-16 For AC-powered application only A5350 Ion — Continuous Pulsing 6 V to 12 V Yes -10 to 60 DIP-16   A5364 Ion — Temporal (T3) 6 V to 12 V Yes -10 to 60 DIP-16   A5367 Ion Yes Temporal (T3) 6 V to 12 V Yes -10 to 60 DIP-16   A5358 Photo Yes Continuous Pulsing 6 V to 12 V — -25 to +75 DIP-16, SOIC-16 Warns on degraded chamber sensitivity A5366 Photo Yes Temporal (T3) 6 V to 12 V — -25 to +75 DIP-16, SOIC-16 Warns on degraded chamber sensitivity

All devices include:
• Maximum supply current of 9 µA at 9 V supply
• Piezo horn driver
• Interconnect feature: alarm condition on one interconnected device causes alarm indication on all
  other interconnected devices
• Low battery alert signal

Part Number Maximum Output Voltage (V) Maximum Output Current (mA) Number of Outputs Sink/Source Latched Output Serial Input Packages A6810 60 25 10 Source Yes Yes DIP-18, SOIC-20, PLCC-20 A6812 60 25 20 Source Yes Yes SOIC-28, PLCC-28 A6818 60 25 32 Source Yes Yes PLCC-44