正峰科电子供应5V三相无感驱动IC-AM2355N，正峰科电子供应台湾晶致5V三相无感控制芯片AM2355N

工作参数：

名称：AM2355N
封装：DFN 10L
品牌：Amtek 晶致
描述：三相无感电机驱动IC
工作电压：1.8~6V
输出最大电流：1A
工作温度：-40℃~+125℃
保持温度：-50℃~+150℃

产品特性：

1. 锁保护及自动重启；
2. FG输出；
3. PWM速度控制
4. 过流保护；
5. 热关断保护；
6. 正反转控制；
7. 内置软启动功能，以降低噪音。

Power supply line
The BEMF causes re-circulate current to power supply, please connect a capacitor between power
supply and ground as a route of re-circulate current. And please determine the capacitance after
confirmation that the capacitance does not causes any problems.
2) Ground potential
Ground potential AG and PG pin connect the lowest voltage on the chip and short the path as
possible.
3) PWM speed control
This IC offer PWM pin direct control output transistors for motor speed control. Higher frequency will
reduce output current noise. The control input frequency recommended operation between 20 KHz
to 50 KHz. If frequency is slower than 500Hz (typ.), it will go into stand-by mode.
This pin connect internal pull-high resistor 200K ohm. When connect to VCC or floating. The motor
will rotate in the full speed.
4) Soft Switching Circuit
This IC use duty-variable switching for low acoustic noise and vibration.
5) Start-up Circuits
The OSC pin is defined a sensor-less start-up commutation frequency. The connecting capacitor is
between the OSC pin and ground. Variable Motors start-up characteristic are variable with different
capacitors. Variable Motors should select suitable capacitor for optimum start-up characteristics. If
the capacitance value is larger, the variation start-up time is longer. Also, if the capacitance value is
smaller, the motor start-up time is shorter and might cause start-up failed by fan friction.
6) FG (Function Generator) function
This FG pin is made up with an open drain output.
Recommend connect a resistance of 10k ohm to VCC.
7) Thermal design and Thermal shutdown
The thermal design should allow enough margins for actual power dissipation. In case the IC is left
running over the allowable loss, the junction temperature rises, and the thermal-shutdown circuit
works at the junction temperature of 170°C (typ.) (the outputs of all the channels are turned off).
When the junction temperature drops to 145°C (typ.), the IC start operating again.
8) FR (Forward and Reverse) function
FR high: U -> V-> W ； FR low: U->W->V 。There is a internal pull low 100kΩ resistor which
means the default setting is low if this pin is floating. Motor direction can be forward or reverse by
switching FR Voltage level. When motor direction is going to be changed, larger pick current level
will be happened. Please consider the current and power dissipation.