特性 Features

? 3-channel (D1/D2/D3) low current sinks

? 40mV typ. at 5mA per channel

? 1-channel (D4) high current sink

? Drives up to 600mA

? Safety timer

? I2C compatible LED Programming

? Individual channel control

? On/Off Interval Time Control

? Dimming Up/Down Time

? RGB LED Color Control

? 193 low current settings (D1/D2/D3)

? 24mA max, 0.125mA step

? ±5 current matching at max current

? 256 low current level settings (D4) up to 48mA

? 39 high current level settings (D4) up to 600mA

? AutoBlinQ LED1 (D1) mode indicates charging

? Blinking period: 2s

? Current setting: 6mA

? VIN Range: 2.7V to 5.5V

? 0.2μA Shutdown Current

? Pb-free Packages

? UTDFN-10 2.0x2.0mm

? -40°C to +85°C Temperature Range

Applications

? Mobile Phones and Handheld Devices

? RGB indicator LEDs

? Front-side (Selfie) Flash

? Infrared Iris Detection

Brief Description

The KTZ8807 is a fully programmable, constant current

RGB LED driver plus a high current White LED driver, with

a flexible control interface. The device is ideally powered

from one-cell lithium-ion/polymer, 3-cell NiCd/NiMH/

Alkaline batteries, or systems with 3.3V or 5V supplies. It

provides four independent programmable constant current

sinks without requiring any external components.

With an on-chip timing control unit, LED blink rate, fade-in

and fade-out are user-adjustable resulting in unique color

lighting patterns.

Ten internal registers are programmed via the I2C control

interface with a built-in decoder allowing individual control

of the LED channels’ On/Off state and current level. A total

of 193 current levels for D1-D3 are available for each

channel with 0.125mA steps from 0.125mA to 24mA and

39 flash current levels for D4 up to 600mA.

AutoBlinQ mode automatically turns on and off LED1 (on

D1 pin) at 6mA every 2s after EN pin goes high. In this

mode, a phone with a discharged battery connected to a

charger can have LED1 blink to notify that the battery is

charging.

It has both I2C interface and hardware STROBE pin for

LED4(D4 pin). The integrated current sink is independently

controlled. On/off conditions and current settings in

Flash/IR modes can be programmed independently by the

I2C interface. In shutdown mode, the quiescent current is

reduced to less than 1μA.