EV3398T-F-00A
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The MP3398T 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 able to expand the number of LED channels with two or more ICs in parallel sharing a single power source.
The MP3398T uses peak-current mode with a fixed switching frequency. The frequency is programmable through an external setting resistor. The MP3398T drives an external MOSFET to boost up the output voltage from a 4.5V to 33V input supply. It regulates the current in each LED string to the value set by an external current-setting resistor.
The MP3398T applies 4 internal current sources for current balance. The current matching can achieve 2% regulation accuracy between strings. Its low regulation voltage on LED current sources reduces power loss.
The MP3398T supports direct PWM dimming. In addition, rich protection modes are integrated including OCP, OTP, UVP, OVP, LED short/open protection, inductor/diode short protection.
The MP3398T is available in a TSSOP-16EP package.
Product Features
- 4-String, Max 400mA/String WLED Driver
- 4.5V to 33V Input Voltage Range
- 80V Abs. Rating for Each String
- 2% Current Matching Accuracy Between Each String
- PWM Dimming
- Cascading Capability with a Single Power Source
- LED Open and Short LED Protection
- Programmable Recoverable Over Voltage Protection
- 0.2V Latch-off OCP Protection Threshold.
- Recoverable thermal Shutdown Protection
- TSSOP-16EP Package
Parametrics
- IC Supported 1MP3398A
Monolithic IC
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IC Details
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. The MP3398A is available in SOIC16, TSSOP16-EP and SOIC20 packages.
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