Mini backlight - WH5097D

Product Specification

The WH5097D is a 4 channel Mini LED driver designed for driving 2D-Backlight displays and it can support 12 bit PWM. With the appropriate timing control, the WH5097D can implement direct drive or scanning type driving methodologies. This device can deliver up to 30mA of continuous current per channel. The WH5097D utilizes a proprietary interface protoco and self-addressing algorithm so that each WH5097D on the BLU (Backlight Unit) is given a unique address with which to communicate with the backlight timing controller (BCON).

Full protections are included, such as built-in LED open/short detection and thermal shutdown.

Features：

Supply Voltage
VDD 3.0V~5.5V
Active Mode Current: 450uA(Typ.)

Internal OSC up to 16MHz

Frequency Multiplication
-AM (Direct Driving) w/ x1, x2, x4, x8,x16,x32,x64

4 high precision current sinks (l-sinks)
Breakdown voltage> 40V
Driving current range,(0.5~5mA)(1.0~10mA),(2.0~20mA) and (3.0~30mA)
Individual 7 bit |-DAC for each l-sink
0.4V saturation voltage @25mA for each l-sink
12-Bit true brightness control resolution with PwM dimming at 32kHz (with dither)
PWM output frequency support (direct driving mode):60/12011441240148019601192013840Hz
PWM output frequency accuracy:+/-2%
DC l-sink accuracy:+/-2%
2 Bit programmable slew rate control for EMl reduction from 0.3us to 2us

2+2 bit PWM output skew control
Centre/Forward PWM waveform alignment

Dimming mode control scheme
-PWM -12 bits

Interface
-Brightness control input (Dip)
-Dynamic headroom status output
-Fault reporting output (Dis/Dos)

Diagnostics:
LED short detection
LED open detection
Input UVLO
Thermal shutdown at 165°C w/ 30°C
Hysteresis

Chip internal status readback
Vch measurement
-OTP trigger event
-LED Open/Short status

Package:
-CSP-10 Bumps
-DFN3x3-10L

Applications：
-Control Panel lllumination
-Local Dimming LED Backlight System