EVB_RT4531WSC: 2 Channel @ 20mA, 2.5 ~ 5.5V in

Summary

The RT4531 is a dual-channel current source with high efficiency asynchronous boost converter for backlight application. The RT4531 has built-in 1.5A/36V power MOSFET and two high current-matching capability current sink, so RT4531 can drives up 10 series x 2 parallel white LEDs. The RT4531 can allow very low voltage headroom control, therefore to improve LED strings efficiency effectively. The RT4531 supports both PWM dimming and 1-wire digital dimming interface and it can realize 10 bit brightness code programming.

The RT4531 provides complete protection functions such as input Under-Voltage Lockout (UVLO), Over-Current Protection (OCP), Output over Voltage (OVP) and Over Temperature Protection (OTP).The RT4531 optimizes the feedback regulation voltage to provide high efficiency and also high current matching, within +/-2%

Specifications

Manufacturer	Richtek USA Inc.
Category	Lighting
Sub-Category	LED Drivers - DC In
Eval Board Part Number	EVB_RT4531WSC-ND
Eval Board Supplier	Richtek USA Inc.
Eval Board	Normally In Stock
Voltage In	2.5 ~ 5.5 V
Topology	Step Up
Current Out	20 mA
Voltage Out (Max)	36 V
Outputs and Type	2 Non-Isolated
Efficiency @ Conditions	>80%, 3.6V in, 31V @ 10 ~ 20 mA (10s2p)
Features	1-Wire Interface Over Current Protection Over Voltage Protection PWM Interface Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	1 MHz
Component Count + Extras	31 + 0
Design Author	Richtek USA Inc.
Application / Target Market	Cell Phones Handheld games LCD Backlighting Tablets
Main I.C. Base Part	RT4531
Date Created By Author	2017-11
Date Added To Library	2022-06