ADD5203:
8-String, White LED Driver with SMBus and PWM Input for LCD Backlight Applications
The ADD5203 is a white LED driver for backlight applications
based on high efficiency, current-mode, step-up converter technology.
It is designed with a 0.15 Ω, 2.9 A internal switch and a
pin-adjustable operating frequency between 350 kHz and 1 MHz.
The ADD5203 contains eight regulated current sources for
uniform brightness intensity. Each current source can be driven
up to 30 mA, and the LED driving current is pin adjustable by
an external resistor. The ADD5203 drives up to eight parallel
strings of multiple series connected LEDs with a ±1.5% current
matching between strings.
The ADD5203 provides various dimming modes. Each
dimming mode is selectable with an external dimming mode
selection pin. The LED dimming control interface can be
achieved through PWM input and/or SMBus. The device provides adjustable output dimming frequency range from
200 Hz to 10 kHz by an external resistor and capacitor. The
ADD5203 operates over an input voltage range of 6 V to 21 V,
but the device can function with a voltage as low as 5.6 V.
The ADD5203 also has multiple safety protection features to
prevent damage during fault conditions. If any LED is open or
short, the device automatically disables the faulty current source.
The internal soft start prevents inrush current during startup.
Thermal shutdown protection prevents thermal damage.
The ADD5203 is available in a low profile, thermally enhanced,
4 mm × 4 mm × 0.75 mm, 28-lead, RoHS-compliant lead frame
chip scale package (LFCSP_WQ) and is specified over the
industrial temperature range of −25°C to +85°C.
产品应用- Notebook PCs, UMPCs, and monitor displays
FEATURES and BENEFITS- Integrated 50 V MOSFET with 2.9 A peak current limit
- Input voltage range: 6 V to 21 V
- Maximum output adjustable up to 45 V
- 350 kHz to 1 MHz adjustable operating frequency
- Overvoltage protection (OVP) up to typical 47.5 V
- Built-in soft start for boost converter
- LED current adjustable up to 30 mA for each channel
- Headroom control to maximize efficiency
- Adjustable dimming frequency: 200 Hz to 10 kHz
- LED open and short fault protection
- See data sheet for additional features
| |
ADD5203 产品订购信息
| Model | Package | Pins | Temp. Range | Packing, Qty | Price*(100-499) | Price*1000 pcs | RoHS |
|---|
| ADD5203ACPZ-RL
Status:
Production | 28 ld LFCSP (4x4x w/2.60mm EP) | 28 | Ind | Reel, 5000 | - | $1.04 |
Y
|
ADD5201/ADD5203 Evaluation Board
| Model | Description | Price | RoHS |
|---|
| ADD5203CP-EVALZ | Driver Board and the 8 Channel LED Board | $100.00 | Yes |
| ADD5203EB-EVALZ | Driver Board | $50.00 | Yes |
技术资料
