A Product Line of
1A LED DRIVER WITH INTERNAL SWITCH
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.
Simple Low Parts Count
Internal 40V NDMOS Switch
1A Output Current
Single Pin On/Off and Brightness Control Using DC Voltage or
High Efficiency (up to 97%)
Wide Input Voltage Range: 6V to 40V
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
Low voltage halogen replacement LEDs
Low voltage industrial lighting
LED back-side lighting
Document number: DSxxxxx Rev. 1 - 1
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