The LPQ3337 is an automotive high-efficiency boost LED driver with internal low on resistance NMOS. The device has six high precision current sinks which can support 150mA for each channel. It regulates the current in each LED string to the value set by an external current-setting resistor. LED brightness can be controlled globally through the I2C interface or PWM input.
The LPQ3337 has a standard I2C digital interface for easy use. The switching frequency can be configured via an external resistor, the I2C interface, or an external clock signal.
The LPQ3337 provides analog dimming, PWM dimming, and mix dimming modes with a PWM input. The dimming mode can be selected via the I2C interface or the MODE pin. The device also has a phase shift function to eliminate noise during PWM dimming.
The LPQ3337 implements comprehensive protection modes including over-current protection (OCP), over-voltage protection (OVP), over-temperature protection (OTP), LED short protection, and LED open protection.
The device can automatically decrease the LED current when the junction temperature is higher than the threshold.
This device is designed to drive the white LED arrays as backlighting for small-sized or medium-sized LCD panels.
The LPQ3337 is available in a QFN-24 (4mm×4mm) package, and the guaranteed operating ambient temperature range is -40°C to 125°C.