DESCRIPTION

The MPQ7220 is a boost converter with six channel current sources. It is designed for driving automotive tail lights.

The MPQ7220 uses peak current mode as its PWM control architecture. The switching frequency can be programmed by a resistor. It independently regulates the current in each LED string to the value set by an external current-setting resistor.

The device applies six internal current sources, one in each LED string terminal to achieve a current balance with 2.5% current regulation accuracy between strings. The low headroom voltage for LED regulation and on resistance of switching MOSFETs allows for high efficiency.

The MPQ7220 has rich protection modes to guarantee safe operation. Protection modes include OCP (over-current protection), OVP over-voltage protection), OTP (overtemperature protection), and LED string short and open protection. The LED current decreases at high temperatures.

The MPQ7220 is available in QFN-24 4mmx4mm) and TSSOP28-EP packages.

FEATURES

 3.5V to 36V Input Voltage Range

 Six Channels with Max 100mA per Channel

 Internal 100mΩ, 50V MOSFET

 Programmable Up to 2.2MHz fSW

 External Sync SW Function

 PWM Dimming (Dimming Frequency from 100Hz to 20kHz)

 Excellent EMI Performance, Spread Spectrum

 Disconnect VOUT from VIN

 2.5% Current Matching

 Cycle-by-Cycle Current Limiting

 Programmable LED Short Threshold

 Programmable OVP Threshold

 LED Current Auto-Decrement at High Temperatures

 LED Short/Open, OTP, OCP, Inductor Short Protection

 Fault Indicator Signal Output

 Available in QFN-24 (4mmx4mm) and TSSOP28-EP Packages

 AEC-Q100 Grade 1

APPLICATIONS

 Automotive Tail Lights