IS31BL3228B - Lumissil

IS31BL3228B WHITE LED DRIVER

The IS31BL3228A (IS31BL3228B) is a low noise, constant frequency charge pump DC/DC converter for white LED applications. The IS31BL3228A (IS31BL3228B) is capable of driving up to four (six) channels of LEDs at preset 20mA per channel from a 2.8V to 5.5V input. The current sinks may be operated individually or in parallel for driving higher current LEDs. Onl.

Features

• VCC range: 2.8V to 5.5V
• Fully programmable current with single wire
• 14 current levels
• Drives up to four (IS31BL3228A)/six (IS31BL3228B) channels of LEDs
• No inductors, low noise operation
• Built-in thermal protection
• Automatic soft start
• Low shutdown current: ISD< 3μA
• UTQFN-12 (2mm×2mm) package
• RoHS & Halogen-Free Compliance
• TSCA Compliance APPLICATIONS
• Cell phone, smart phone, PDA
• MP3, MP4, PMP
• White LED backlighting Figure 1 Typical Application Circuit (IS31BL3228A) Note: COUT can’t be less than 2.2μF, and when less than six channels are used, keep the unused pin t.