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
- 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
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.
- Notebook PCs, UMPCs, and monitor displays
Markets and Technologies
Product Lifecycle Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Evaluation Kits (1)
ADD5203CP-EVALZ is the ADD5201/3 driver board and the 8 channel LED board.
ADD5203EB-EVALZ is just the ADD5201/3 driver board.
Features & BenefitsLED driver with integrated inductive boost converter
- Integrated 50V MOSFET with 2.9A peak current limit
- 6 V to 21 V input voltage range (easily increased with external Zener diode).
- 350kHz to 1 MHz adjustable operating frequency
- Built-in soft start
- Overvoltage protection programmable up to 47.5V
- Easily combine current sinks for up to 240mA of total LED Current.
- 40 μA (typ) shutdown Iq
- LED current adjustable up to 30mA for each channel
- ± 1.5% matching, ± 3% accuracy
- DC current level brightness control with PWM input
- Headroom control to maximize efficiency
- LED open fault protection
- PWM Input Control or SMBus Digital Input
- Fixed Delay PWM Dimming with 8 bit resolution
- No Delay PWM Dimming with 8 bit resolution
- Direct PWM Dimming control
- DC Current Dimming with 8 bit resolution
- Phase Shift PWM Dimming with 8 bit resolution
- (ADD5201 only)
- Open LED Protection
- Shorted LED Protection
- Overvoltage Protection
- Thermal shutdown
- Under Voltage Lock Out (UVLO)
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
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