OB3350CP LED驱动器IC_引脚排列_功能规格

来源：HQBUY 发布时间：2020-08-11

摘要： OB3350是一个LED驱动器IC，其通常在LCD / LED的背光源供电用的显示器或以恒定电流以驱动LED的敏感。该IC由PWM升压驱动器组成，该驱动器可以使用电流模式控制和固定频率操作来调节流经LED的恒定电流。该IC通常与功率开关（如MOSFET）一起用于驱动LED。

OB3350是一个LED驱动器IC，其通常在LCD / LED的背光源供电用的显示器或以恒定电流以驱动LED的敏感。该IC由PWM升压驱动器组成，该驱动器可以使用电流模式控制和固定频率操作来调节流经LED的恒定电流。该IC通常与功率开关（如MOSFET）一起用于驱动LED。

OB3350CP LED驱动器IC OB3350CP LED驱动器IC引脚排列

引脚配置

Pin Number	Pin Name	Description
1	Vin	This is the power supply input, where the recommended operating range is 8V to 35 V DC.
2	GATE	It is the gate driver output pin which can be connected to the MOSFET (acts like a switch) to either allow the required LED current or else blocks it by turning off the input at gate terminal.
3	GND	This is the power ground terminal.
4	CS	The Current sense terminal gets the LED current and based on its intensity the gate driver output (GATE terminal) will be altered.
5	FB	It is the LED current feedback input terminal which is used to monitor the intensity of current flowing through the device so that the current can be balanced to avoid damaging the external device.
6	COMP	It is the Boost Converter Loop compensation terminal which is used to control the inductor current based on the type of load used.
7	OVP	The Over Voltage Protection terminal monitor the LED currents, if they go beyond the threshold levels, if any such conditions are found it resets the Vin or PWM signal to avoid the external LED getting damaged.
8	PWM	PWM stands for Pulse Width Modulation, with respect to OB3350CP, it is used to control the brightness of the LED. An external PWM signal of frequency range 100Hz to 1KHz and voltage range of 0V to greater than 2.5V can be applied to this pin.

技术指标

工作电压：8V至35V
突发调光频率：100Hz至1KHz
工作电源电流：3 mA（最大值）
待机电流：400 μA（最大值）
PWM工作频率：175 KHz至275 KHz
PWM输入阈值（低）：1.3 V（最小值）
PWM输入阈值（高）：2.5 V（最大）
输出过压阈值：1.8V（最小），2.2V（最大）