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3974

Features: ±1.5 A, 50 V Continuous Output RatingLow rDS(on) DMOS Output DriversProgrammable Slow, Fast, and Mixed Current-Decay ModesSerial-Interface Controls Chip FunctionsSynchronous Rectification for Low Power DissipationInternal UVLO and Thermal Shutdown CircuitryCrossover-Current ProtectionSle...

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SeekIC No. : 004229510 Detail

3974: Features: ±1.5 A, 50 V Continuous Output RatingLow rDS(on) DMOS Output DriversProgrammable Slow, Fast, and Mixed Current-Decay ModesSerial-Interface Controls Chip FunctionsSynchronous Rectification ...

3974 Data Sheet

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Part Number:
3974
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/21

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Product Details

Description



Features:

±1.5 A, 50 V Continuous Output Rating
 Low rDS(on) DMOS Output Drivers
 Programmable Slow, Fast, and Mixed Current-Decay Modes
 Serial-Interface Controls Chip Functions
 Synchronous Rectification for Low Power Dissipation
 Internal UVLO and Thermal Shutdown Circuitry
 Crossover-Current Protection
 Sleep and Idle Mode


Pinout

Connection Diagram


Specifications

Load Supply Voltage, VBB .................................50 V
Output Current, IOUT .................................. ±1.5 A
Logic Supply Voltage, VDD .............................. 7.0 V
Logic Input Voltage Range, VIN
Continous ...............................-0.3 V to VDD + 0.3 V
tW < 30 ns ............................ -1.0 V to VDD + 1.0 V
Reference Voltage, VREF ................................... 3 V
Sense Voltage (dc), VS
Continous ....................................................... 0.5 V
tW < 1 s ........................................................2.5 V
Package Power Dissipation, PD ......................3.9 W
Operating Temperature Range,
TA .................................................-20°C to +85°C
Junction Temperature, TJ ........................... +150°C
Storage Temperature Range,
TS .............................................. -55°C to +150°C


Description

Designed for pulse-width modulated (PWM) current control of two dc motors, the A3974SED is capable of output currents to ±1.5 A and operating voltages to 50 V. Internal fixed off-time PWM current-control timing circuitry can be programmed via a serial interface to operate in slow, fast, and mixed current-decay modes.

Independant ENABLE input terminals are provided for use in controlling the speed and torque of each dc motor with externally applied PWM control signals.

Synchronous rectification circuitry allows the load current to flow through the low rDS(on) of the DMOS output driver during the current decay. This feature will eliminate the need for external clamp diodes in most applications, saving cost and external component count, while minimizing power dissipation.




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