ZLED7012ZI1R

ZLED7012 Low-Voltage Four-Channel LED Driver Datasheet Brief Description Benefits The ZLED7012, one of our ZLED family of LED control Current matching accuracy: 0.9% (typical) ICs, is a low-noise, constant-frequency charge pump One-pin on/off or brightness control for up to four DC/DC converter that can drive up to four LED LEDs via a simple PCC serial interfaceno pulse- channels, providing a programmable constant current width modulation or additional control circuit needed level ranging from 1.8mA to 20mA per LED channel. It 14 programmable current levels for achieving real- can also drive higher current LEDs because its current time control of effects such as LED fade-out or sinks can operate in parallel. It enables white or other sudden changes in brightness color LED applications that require uniform intensity and/or linear progressions in brightness. Capable of Low EMI and back-injected noise because the operating efficiently with DC voltage supplies ranging charge pump is not inductor-based from 2.8V to 5.5V, it is ideal for small, battery-powered Very few external components needed for operation applications because very few external components are Flexible design enables diverse LED applications: up needed: typically one small-dimension 1F capacitor to 20mA per channel across the C+ and C- pins and two small-dimension 2.2F capacitors to GND from the VCC and Vout pins. LED driver family concept with low-voltage six-channel LED driver ZLED7022 The ZLED7012s Pulse Count Control (PCC) serial digi- tal input is used to enable/disable the LEDs and set the current level (14 settings using a nearly logarithmic scale to provide a linear brightness progression). This Available Support simple, high-speed interface allows efficient real-time Evaluation Kit management of LEDs via microcontrollers or control systems. The ZLED7012s features include integrated soft-start circuitry to protect against excessive in-rush current dur- Physical Characteristics ing power-on and a low-current shutdown mode that Voltage supply: 2.8V to 5.5V DC reduces quiescent current consumption to approximately Operating temperature: -40C to 85C 1A (typical) by disconnecting the load from the input when the EN/SET pin is low for a specified time. Small footprint 12-pin UTQFN package (2mm2mm) Features Low quiescent current in low-current shutdown mode: 1A typical <2A maximum Integrated thermal shutdown protection prevents damage by shutting down the ZLED7012 if the die ZLED7012 Application Circuit junction temperature exceeds 160C (typical) Fixed charge pump switching frequency: 1MHz (typ.) Soft-start feature protects against excessive 1F inrush current during power-on Cpump C+ C- 2.8 V to 5.5V Vout VCC Cout Cin 2.2F ZLED7012 2.2F GND D0 D1 D2 EN/SET 1 2 n 14 D3 NC NC 2016 Integrated Device Technology, Inc. 1 April 20, 2016 ZLED7012 Low-Voltage Four-Channel LED Driver Datasheet Block Diagram 1F Cpump C- C+ Vout S1 S4 VCC EN CP S3 Vref S2 Charge Pump D0 Vcon Cout M1 + A 2.2F ZLED7012 - Iref <1:14> Iout R1 S<1:14> D0 Driver R2 D1 EN/SET Data Processor D2 <D1:D3> Drivers D3 SD GND Typical Applications LED backlighting for portable devices LED lighting for cell phones, smartphones. PDAs Illumination of digital photo frames Backlighting for GPS / navigation systems Low voltage LED lighting fixtures General purpose low-voltage industrial and consumer applications Ordering Information Product Sales Code Description Package ZLED7012ZI1R ZLED7012 Low-Voltage Four-Channel LED Driver UTQFN12 (2x2)mm Tape & Reel ZLED7012KIT-E1 ZLED7012 Evaluation Board Kit 2016 Integrated Device Technology, Inc. 2 April 20, 2016