Part Number: MP3398A
Function: White LED Controller
Package: SOIC16, TSSOP16-EP and SOIC20 Type
Manufacturer: MPS
Images:
Description
The MP3398A is a step-up controller with 4 current channels, which is designed to drive WLED arrays for large-size LCD-panel backlighting applications. It is flexible to expand the number of LED channels by two or more ICs in parallel sharing a single inductive power source. The MP3398A uses peak-current mode with fixed switching frequency.
The frequency is programmable by an external setting resistor. The MP3398A drives an external MOSFET to boost up the output voltage from a 5V to 28V input supply. It regulates the current in each LED string to the value set by an external current-setting resistor. The MP3398A applies 4 internal current sources for current balance. The current matching can achieve 2.5% regulation accuracy between strings. Its low regulation voltage on LED current sources reduces power loss.
The MP3398A can support both analog and PWM dimming independently to meet the different dimming-mode request. In addition, rich protection modes are also integrated including OCP, OTP, UVP, OVP, LED short/open protection, inductor/diode short protection.
Features
1. 4-String, Max 350mA/String WLED Driver
2. 5V to 28V Input Voltage Range
3. 2.5% Current Matching Accuracy Between Strings
4. Programmable Switching Frequency
5. PWM and Analog Dimming Mode
6. Cascading Capability with a Single Power Source
7. LED Open and Short LED Protection
8. Programmable Over-Voltage Protection
9. Recoverable Thermal Shutdown Protection
10. Over Current Protection
11. Inductor/Diode short Protection
12. Under-Voltage Lockout
Pinouts:
Applications:
1. Desktop LCD Flat Panel Displays
2. Flat Panel Video Displays
3. 2D/3D LCD TVs and Monitors
MP3398A PDF Datasheet
