MP3398B

アクティブ
4-Channel Boost WLED Controller with OCP Latch Off Protection


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製品説明

The MP3398B 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 MP3398B uses peak-current mode with fixed switching frequency. The frequency is programmable by an external setting resistor. The MP3398B 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 MP3398B 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 MP3398B 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 MP3398B is available in a TSSOP16-EP package.

製品の特長

  • 4-String, Max 350mA/String WLED Driver
  • 5V to 28V Input Voltage Range
  • 2.5% Current Matching Accuracy Between Strings
  • Programmable Switching Frequency
  • PWM and Analog Dimming Mode
  • Cascading Capability with a Single Power Source
  • LED Open and Short LED Protection
  • Programmable Over-Voltage Protection
  • Recoverable Thermal Shutdown Protection
  • Latch-off Over Current Protection
  • Inductor/Diode short Protection
  • Under-Voltage Lockout
  • TSSOP16-EP Package

パラメータ

  • Ishutdown (µA)0.01
  • Vin (min) (V)5
  • Vin (max) (V)28
  • Channels4
  • fsw (min) (kHz)100
  • Ichannel (max) (A)0.35
  • LEDx ABS Voltage (V)55
  • fsw (max) (kHz)500
  • GradeCatalog
  • PackageTSSOP16 EP
  • Power MOSFETExternal
  • TopologyBoost
  • Dimming (Output)P-Dim, A-Dim
  • Iq (mA)1.35
  • Typical LCD Screen SizesMedium (10"-29"), Large (30"-45"), Large+ (>45")
  • Other FeaturesCascade, Inductor Short Protection

4 strings 350mA White LED Driver Evaluation Board

The EV3398A-S-00A is an evaluation board for the MP3398A, a step-up converter designed for liquid-crystal displays that employ an array of LEDs as the light source. It can drive up to 4 strings LEDs in parallel with 350mA/string maximum current.

The MP3398A uses current mode, fixed switching frequency architecture. The frequency is programmable by an external frequency setting resistor. 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 programmed value set by an external current setting resistor.

The MP3398A can support both analog and PWM dimming independently to meet the special 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 and SOIC20 packages.

¥10,865.00 + tax


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