驱动部分又包括恒电流控制，恒功率控制和脉冲调制控制三个方面。
The part of driving includes constant current control, constant power control and pulse modulation control.
输出电流不受供电电压波动的影响，实现了电路的恒流功能。
The output current is never influenced by power supply, realizing the invariableness of load current.
恒流检测电路5检测小电流。
The constant current detecting circuit 5 detects a small current.
采用(PWM)控制技术，恒流特性好，电流控制精确。
Apply PWM control technology, outstanding constant current property, precise current control.
采用(PWM)控制技术，恒流特性好，电流控制精确。
Apply PWM control technology, outstanding constant current property, precise current control.
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