LP5813 datasheet(17/60 Pages) TI

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LP5813

OUT0

OUT1

OUT2

OUT3

VIN

GND

OFF

VIN

SCL

SDA

SYNC

VOUT

LED0

LED1

LED2

LED3

Red LED

Green LED

Blue LED

White LED

Figure 9-4. Direct Drive Mode (led_mode = 0h)

9.3.2.2 TCM drive mode

The TCM drive mode is used to drive up to 12 LEDs (or 4 RGB LEDs) with TCM scheme, which is configured by

setting led_mode = 1h/2h/3h/4h for 1/2/3/4 scans. After setting the scan count, 'scan_order_x' (x = 1, 2, 3, 4) bits

need to be written for the scan orders of each output. The default order is from OUT0 to OUT3 in 4 scans mode.

The TCM drive mode can drive 1 to 12 LEDs with 1 to 4 scans or ¼ to 1 multiplexing ratio. The names LED_xy

(x = A, B, C, D; y = 0, 1, 2) are used in the register map for the corresponding LED, which is connected to OUTx

(x = 0, 1, 2, 3). The detail naming rule is showed in Table 9-1.

Table 9-1. LED Names in Register Maps for TCM Drive Mode

LED name in registers

LED Cathode

OUT0

OUT1

OUT2

OUT3

LED Anode

OUT0 (A)

LED_A0

LED_A1

LED_A2

OUT1 (B)

LED_B2

LED_B0

LED_B1

OUT2 (C)

LED_C1

LED_C2

LED_C0

OUT3 (D)

LED_D0

LED_D1

LED_D2

The typical application circuits are demonstrated as Figure 9-5 (1 scan), Figure 9-6 (2 scans), Figure 9-7 (3

scans) and Figure 9-8 (4 scans).

Note

To avoid unexpected emitting, in RGB LEDs applications, Red LEDs are recommended to be placed

in LED_x1 (x = A, B, C, D) positions.

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LP5813

SNVSC74 – SEPTEMBER 2023

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