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%
| 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 |
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