(China (Mainland))
Product Summary
The A1442 is a full-bridge motor driver designed to drive low-voltage, brushless dc motors. The A1442 is achieved by use of a single Hall element sensor to detect the rotational position of an alternating-pole ring magnet. A highdensity CMOS semiconductor process allows the integration of all the necessary electronics. This includes the Hall element sensor, the motor control circuitry, and the full output bridge. Low-voltage design techniques have been employed to achieve full device functionality down to low VDD values. The A1442 provides enhanced reliability (including reverse battery protection and output short circuit protection) and eliminates the need for any external support components.
Parametrics
A1442 absolute maximum ratings: (1)Forward Supply Voltage VDD: 5.0 V; (2)Reverse Supply Voltage VRDD: –5.0 V; (3)Output Voltage VOUT VDD > 0 V: 0 to VDD + 0.3 V; (4)Reverse Output Voltage VROUT VDD > 0 V: –0.3 V; (5)sleep Input Voltage VIN: 0 to VDD + 0.3 V; (6)Peak Output Current IOUTpk < 1 ms: ±400 mA; (7)Operating Ambient Temperature TA Range E: –40 to 85 ℃; (8)Junction Temperature TJ(max): 165 ℃; (9)StorageTemperature Tstg: –65 to 165 ℃．
Features
A1442 features: (1)Low voltage operation; (2)Reverse voltage protection on VDD and sleep Ppins; (3)Output short circuit and thermal shutdown protections; (4)Soft switching algorithm to reduce audible switching noise and EMI interference; (5)Unidirectional working mode provides motor rotation in one direction; (6)Hall chopper stabilization technique for precise signal response over operating range; (7)Sleep mode pin allowing external logic signal enable/ disable to reduce average power consumption; (8)Antistall feature guarantees continuous rotation; (9)Low current consumption sleep mode; (10)Single-chip solution for high reliability; (11)Miniature MLP/DFN package．
Diagrams
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 A1442 |
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