LP5562 datasheet(41/52 Pages) TI1

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LP5562

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SNVS820A – APRIL 2013 – REVISED SEPTEMBER 2015

8.2.2 Detailed Design Procedure

Table 45. Recommended External Components

MODEL

TYPE

VENDOR

VOLTAGE RATING

SIZE INCH (MM)

1 µF for CIN

C1005X5R1A105K

Ceramic X5R

TDK

10 V

0402 (1005)

GRM155R61A105KE15D

Ceramic X5R

Murata

10 V

0402 (1005)

LEDs

User Defined

8.2.2.1 Output Current Configuration

•

For 22-mA “B” output current the register address 0x05 is set to 0xDC. B_CURRENT[7:0] = (22 mA / 0.1) =

220 decimal.

•

For 22-mA “G” output current the register address 0x06 is set to 0xC8. G_CURRENT[7:0] = (20 mA / 0.1) =

200 decimal.

•

For 24-mA “R” output current the register address 0x07 is set to 0xF0. R_CURRENT[7:0] = (24 mA / 0.1) =

240 decimal.

•

For 18-mA “WLED” output current the register address 0x0F is set to 0xB4. W_CURRENT[7:0] = (18 mA /

0.1) = 180 decimal.

8.2.2.2 PWM Frequency Configuration

To set the PWM frequency to 256 Hz the PWM_HF bit must be written to '0'. It is located at register address

0x08 bit 6.

8.2.2.3 Clock Source Configuration

To set the clock source to external clock input the INT_CLK_EN and CLK_DET_EN bits are set to “00”. These

are located at register address 0x08 bits 0 and 1.

8.2.2.4 Power-Save Mode Configuration

To enable the power save mode function the PWRSAVE_EN bit must be set to '1'. It is located at register

address 0x08 bit 5.

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