The MAX25530's power supplies consist of a synchronous boost converter and an inverting buck-boost converter that can generate voltages up to +18V and -7V, respectively. The positive supply driver can deliver up to 120mA, while the negative supply driver can deliver 100mA.
The start-up and shutdown sequences of all power domains are controlled by one of seven preset modes, which can be selected via a resistor on the SEQ pin or via the I2C interface.
The Maxim Integrated MAX25530 is available in a 40-pin (6mm x 6mm) TQFN package with an exposed pad and operates in an ambient temperature range of -40°C to +105°C.
Features:
4-output TFT-LCD bias power
- 2.8V to 5.5V input for the TFT-LCD section
- Integrated 430kHz or 2.2MHz boost and buck boost converters
- 10mA positive and negative gate voltage
- Regulators (inverting tripler/doubler) with adjustable output voltage
- Flexible sequence programmable via resistors through the SEQ pin
- Low voltage detection on all outputs
- Low quiescent current standby mode.
4-channel LED backlight driver
- Up to 150mA current per channel
- 4.5V to 42V input voltage range
- Integrated boost/SEPIC driver (440kHz or 2.2MHz)
- 10,000:1 dimming ratio at 200Hz
- Adaptive voltage optimization to reduce power dissipation in LED current sinks
- Diagnostics open circuit, shorted LED, and short to GND
Low EMI
- Phase-shift control of LED strings
- Dispersion spectrum in the LED driver and TFT
- Selectable switching frequency
I2C interface for control and diagnostics
- Fault indication via FLTB and I2C pins
- Automatic retry after fault detection
Thermal and overload protection.
Operating at ambient temperature from -40°C to +105°C.
40-pin TQFN package (6mm x 6mm) with exposed pad.
AECQ100 grade 1
Applications
- Automotive dashboards
- Automotive central information displays
- Automotive central information displays
- Automotive navigation systems
