Designed for pulse-width modulation (PWM) current control in DC motors, A3959SB, A3959SLB, and A3959SLP are capable of delivering output currents up to ±3 amps and operating at 50 volts. The internal fixed downtime pulse-width modulation (PWM) current-controlled timing circuitry can be adjusted by the control input to operate in low, fast, and mixed current decay modes.
The Phase and Enable inputs control the speed and direction of the DC motor for external application of PWM control signals. An internal synchronous rectification control circuit is used to reduce power consumption during pulse-width modulation (PWM) operation.
Internal circuit protection includes overheating shutdown caused by hysteresis, overvoltage monitoring of power supplies and charging pumps, and crossover current protection. No special power-up sequencing is required.
A3959SB/SLB/SLP 是可供选择的三种功率封装，即带铜质蝙蝠翼状片的 24 引脚塑料双列直插式封装 (DIP)（封装后缀为'B'）、带铜质蝙蝠翼状片的 24 引脚塑料 SOIC（封装后缀为'LB'）以及带外露隔热盘（后缀为'LP'）的薄（
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±3 安培 50 伏特输出率
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低 RDS(on) 输出（270 毫欧，典型）
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混合、快与慢电流-衰减模式
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对低功率耗散同步整流
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内部欠压锁定 (UVLO) 及过热关机电路
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交叉电流保护
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数字 PWM 计时内部振荡器