LP5812系列介绍资料

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LP5812

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具有 I2C 和自动动画控制功能的 4 x 3 矩阵 RGB LED 驱动器

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The LP5812 is a 4 × 3 matrix RGB LED driver with autonomous animation engine control. The device has ultra-low normal operation current with 0.4-mA (typical) when illuminate LEDs.

The time-cross-multiplexing (TCM) structure is adopted, which uses 4 output pins to control 12 LED dots individually. Both high-side scan switch and low-side current sink are contained in one output. The total solution size are minimized for space limited system.

The autonomous animation engine can significantly reduce the real-time loading of controller. Each LED can be configured through the related registers to realize vivid and fancy lighting effects. The device can generate 6-MHz clock signal and use it for synchronizing the lighting effects among multiple devices.

Operating voltage range:
- V CC range: 2.7 V to 5.5 V
- Logic pins compatible with 1.8 V, 3.3 V, and 5 V
Time-cross-multiplexing (TCM) topology:
- Drives up to 12 LEDs or 4 RGB LEDs
- ¼, ⅓, ½, 1 multiplexing ratio
- Supports direct, TCM, and mix-drive modes
4 constant current sinks with high precision:
- 0.1-mA to 51-mA per current sink
- Device-to-device error: max ±5%
- Channel-to-channel error: max ±5%
- Ultra-low headroom voltage: 110 mV (typ.) at 25.5 mA; 210 mV (typ.) at 51 mA
- PWM phase shift configurable for each LED
Ultra-low power consumption:
- Standby: I STB = 26 µA (typical) when CHIP_EN = 0 (data retained)
- Active: I NOR = 0.4 mA (typical) when LED current = 25.5 mA
Analog dimming (current gain control)
- Global 1-bit Maximum Current (MC): 25.5 mA or 51 mA
- Individual 8-bit Dot Current (DC) setting
PWM dimming up to audible-noise-free 24 kHz
- Individual 8-bit PWM dimming resolution
- Linear or exponential dimming curves
Autonomous animation engine control
Individual LED dot open/short detection
Integrated de-ghosting function
1-MHz (max.) I 2C interface
–40°C to 85°C operating temperature range

Number of channels	12
LED current per channel (mA)	50
LED configuration	Matrix
Program memory	Yes
Topology	Linear
Programmable ramp control	Yes
Vin (min) (V)	5.5
Vin (max) (V)	2.7
Iout (max) (A)	0.2
Features	Analog/PWM mixed dimming, Constant current, I2C control, LED Open Detection, LED Short Detection, Programmable lighting engines, Thermal shutdown
Iq (typ) (mA)	0.4
Shutdown current (ISD) (typ) (µA)	0.1
Operating temperature range (°C)	-40 to 85
Rating	Catalog

DSBGA (YBH)	9	2.56 mm² 1.6 x 1.6
WSON (DSD)	8	9 mm² 3 x 3

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LP5812

具有 I2C 和自动动画控制功能的 4 x 3 矩阵 RGB LED 驱动器

4000-306-326