Power Management IC (PMIC) - iML1942

The iML1942 is a highly integrated power management IC for TFT LCD panels. It features a full I2C interface to program various parameters.

The device includes a current-mode boost regulator for AVDD, a synchronous boost converter for VBK1, an optional inverting regulator or negative charge pump regulator for VGL, a negative linear regulator for VSS1, an optional boost regulator or charge pump regulator with temperature-compensated output for VGH, a programmable amplifier for VCOM1, a programmable DAC for VCOM2, and a 14-channel programmable gamma amplifier.

The iML1942 device includes various protection features such as input undervoltage lockout (UVLO) and overtemperature shutdown (OTP). The outputs include undervoltage protection (UVP) and short-circuit protection (SCP).

The iML1942 comes in a WQFN 46-pin 6.5 mm x 4.5 mm package with an exposed thermal pad on the bottom for optimal heat dissipation. The device is rated for operation over the -40 to +85°C temperature range.

I. Power Management IC (PMIC) -Features of iML1942:

8.6V to 14.7V TV input power supply voltage range

4.3V to 6V input power supply voltage range for MNT

Full I2C interface control

AVDD, VBK1, VGH, VGL, 1-bit selectable switching frequency (500 kHz/750 kHz)

Optional internal or external MOSFET driver boost regulator for AVDD

-13.5V to 19.8V output voltage range

Synchronous buck regulator for VBK1

-1.8V to 3.35V output voltage range

High-current programmable amplifier for HAVDD

-7-bit resolution

-±200mA output short-circuit current

Optional inverting regulator converter or charge pump regulator for VGL

-3V to -18V output voltage range

-Temperature-compensated output

Negative linear regulator for VSS1

--3V to -16V output voltage range

-Sourcing and sinking capability

Optional boost regulator or charge pump regulator for VGH

-20V to 45V output voltage

-Temperature-compensated output

1-channel programmable amplifier for VCOM1

-7-bit resolution

-±400mA short-circuit current

1-channel programmable VCOM2 DAC

-7-bit resolution

14-channel programmable gamma amplifier

-10-bit resolution

-±100mA short-circuit current

Protection features

-UVP, SCP, OTP

Slave address:

-0100 000 R/W (PMIC)

WQFN 6.5x4.5-46 package
WQFN 6x6-48LPackage

II.Power Management IC (PMIC) -Applications of iML1942:

Monitor panels

TV panels

LCD panels