Typical Application
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Features
Applications
n n n n Low voltage halogen replacement LEDs Low voltage industrial lighting LED back-up lighting Illuminated signs
Description
弟子规全文阅读The PAM2861is a continuous mode inductive step-down converter,designed for driving single or multiple ries 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 1.5A.Depending upon supply voltage and external components,this can provide up to 30watts of output power.
The PAM2861includes the output switch and a high-side output current nsing circuit,which us an external resistor to t the nominal average output current.
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Output current can be adjusted below the t 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 incread using an external capacitor from the VSET pin to ground.Applyi
ng 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.
n n n n n n n n n n n n
Simple low parts count
团课主题Internal 40V NDMOS switch 1.5A output current
Single pin on/off and brightness control Using DC voltage or PWM Soft-start
High efficiency (up to 95%)
Wide input voltage range:6V to 40V Output shutdown
Up to 1MHz switching frequency
Inherent open-circuit LED protection Typical 5%output current accuracy
Pb-free SOT23-5,SOT89-5and PSOP-8Packages
Block Diagram历史十大名将
Pin Configuration
Pin Descriptions
EQ:Product Code of
PAM2861X:Code Y:Year W:Week
Internal 1
23
4
5
EQXYW
5
1
VIN
capacitor clo to device.
TOP VIEW SOT23-5
Top View PSOP-8(EPD)
LX
GND VSET VIN
ISENSE
1
2
3
45P2861XXXYW
TOP VIEW SOT89-5
LX GND VSET VIN
ISENSE
VIN ISENSE AGND
PGND PGND LX LX
Absolute Maximum Ratings
The are stress ratings only and functional operation is not implied Exposure to absolute maximum ratings for prolonged time periods may affect device reliability All voltages are with respect to ground ...
Recommended Operating Conditions
氟康唑说明书Thermal Information
Input -0.3V to 40V LX,V -65to .SET ISENSE -0.3V to 40V -0.3V to 6V
音乐乐理基础知识Maximum 170300,5c
°C °C °C °C Input Ambient -40to 856V to 40V
Junction .-40to 150°C °C °C °C
Electrical Characteristic
T=25°C,V=16V,unless otherwi noted.
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A IN
parameters are not tested at production but guaranteed by design *,.
