The PAM2861 is a continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The device operates from an input supply between 6V and 40V and provides an externally adjustable output current of up to 1A. Depending upon supply voltage and external components, this can provide up to 30 watts of output power.
The PAM2861 includes the output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current.
Output current can be adjusted below the set value, by applying an external control signal to the VSET pin.
The VSET pin will accept either a DC voltage or a PWM waveform.
The soft-start time can be increased using an external capacitor from the VSET pin to ground. Applying a voltage of 0.2V or lower to the VSET pin turns the output off and switches the device into a low current standby state.
特点：
Simple Low Parts Count
Internal 40V NDMOS Switch
1A Output Current
Single Pin On/Off and Brightness Control Using DC Voltage or PWM
Soft-Start
High Efficiency (up to 97%)
Wide Input Voltage Range: 6V to 40V
Output Shutdown
Open LED Protection
Short LED Protection
Up to 1MHz Switching Frequency
Inherent Open-Circuit LED Protection
Typical 5% Output Current Accuracy
Pb-free TSOT25 and SOT89-5 Packages
应用：
Low voltage halogen replacement LEDs
Low voltage industrial lighting
LED back-side lighting
Illuminated signs
公司:深圳市哲瀚电子科技有限公司
联系人:陈小姐
手机:13714441972
电话:0755-82549527/83259945/13714441972
传真:0755-83259945
地址:深圳市福田区深圳市福田区华强北街道深南中路3006号佳和大厦3C006
