I2C Programmable RGB LED Driver with AutoBlinQTM
The KTD2037/2037B is a fully programmable, constant current RGB 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 three 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 191 current levels are available for each channel from 0.125mA to 24mA with a 0.125mA step.
An AutoBlinQ mode automatically turns on and off LED1 (on D1 pin) at 8mA 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.
In shutdown mode, the quiescent current is reduced to less than 1μA.
The device is available in a low profile 8-pin 1.5mm x 1.5mm x 0.5mm Ultra-Thin DFN package. The package is Pb-free and RoHS compliant.
- Ultra low dropout regulated 3-channel current sinks
- 40mV typ. at 10mA per channel
- Programmable LED setting by I2C compatible interface
- Individual channel control
- On/Off Interval Time Control
- Dimming Up/Down Time
- RGB LED Color Control
- 191 current level setting
- AutoBlinQ LED1 (D1 pin) mode
- Blinking period: 2s
- Current setting: 8mA
- Fast, smooth start-up
- VIN Range: 2.7V to 5.5V
- 0.1 μA Shutdown Current
- Pb-free Package: UTDFN-8 1.5×1.5mm
- -40°C to +85°C Temperature Range
- RGB indicator LEDs
- Mobile Phones
- Handheld Devices
- Digital Cameras
|UTDFN-8||1.5mm x 1.5mm x 0.5mm||8||WE|
|Vin (min)||Vin (max)||Number of LEDs/ Channels||LED Channels||Brightness Control||Max Current (A)||Accuracy||Dropout|
|Package Outline Drawing||UDFN-8 WE POD|
|Part Number||Marking||Operating Temperature||Package|
|KTD2037EWE-TR||IJYYZ||-40°C to +85°C||UTDFN1.5×1.5-8|
|KTD2037BEWE-TR||HWYYZ||-40°C to +85°C||UTDFN1.5×1.5-8|
|Buy from Digi-Key|
|Buy from Mouser|