LP8545 datasheet(35/44 Pages) TI1

35 / 44 page

LP8545

www.ti.com

SNVS635D – APRIL 2010 – REVISED DECEMBER 2013

EEPROM ADDRESS 2 register

BOOST_IMAX

1:0

R/W

Boost converter inductor maximum current

00 = 0.9A

01 = 1.4A

10 = 2.0A

11 = 2.5A (recommended)

EEPROM Address 3

Address A3h

EEPROM ADDRESS 3 register

UVLO[1:0]

EN_PSPWM

PWM_FREQ[4:0]

Name

Bit

Access

Description

UVLO

7:6

R/W

00 = Disabled

01 = 2.7V

10 = 6V

11 = 9V

EN_PSPWM

R/W

Enable phase shift PWM scheme

0 = phase shift PWM disabled, normal PWM mode used

1 = phase shift PWM enabled

PWM_FREQ

4:0

R/W

PWM output frequency setting. See PWM Frequency Setting for full

description of selectable PWM frequencies.

EEPROM Address 4

Address A4h

EEPROM ADDRESS 4 register

PWM_RESOLUTION[1:0]

EN_I_RES

LED_FAULT_THR[1:0]

DRV_HEADR[2:0]

Name

Bit

Access

Description

PWM

7:6

R/W

PWM output resolution selection. Actual resolution depends also on the output

RESOLUTION

frequency. See PWM Frequency Setting for full description.

00 = 8...10 bits (19.2 kHz...4.8 kHz)

01 = 9...11 bits (19.2 kHz... 4.8 kHz)

10 = 10...12 bits (19.2 kHz...4.8 kHz)

11 = 11...13 bits (19.2 kHz...4.8 kHz)

EN_I_RES

R/W

Enable LED current set resistor

0 = Resistor is disabled and current is set only with CURRENT EEPROM register

bits

1 = Enable LED current set resistor. LED current is defined by the RISET resistor

and the CURRENT EEPROM register bits.

LED_FAULT_TH

4:3

R/W

LED fault detector thresholds. VSAT is the saturation voltage of the driver, typically

200 mV.

00 = 2.3V

01 = 3.3V

10 = 4.3V

11 = 5.3V

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