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R1214 Series
PWM/VFM Step-up DCDC Converter for White LED

Product Specifications

The R1214 Series are PWM/VFM step-up DC/DC converters for white LEDs. The R1214 includes 2-channel current drivers for white LEDs, an under voltage lockout circuit (UVLO), an overvoltage protection circuit (LxOVP, LEDOVP) and a thermal shutdown protection circuit. The R1214 requires only a small numbers of external components to drive white LEDs with constant current and high efficiency. The power controlling method can be selected from fixed PWM control or PWM/VFM auto switching control. The brightness of the LEDs can be adjusted quickly by applying a 200-Hz to 300-kHz PWM signal to the PWM pin. A 1.27-mm square compact WLCSP-9-P1 package is available.

FEATURES

Input Voltage Range (Maximum Rating) 2.7 V to 5.5 V (6.5 V)
Supply Current Typ. 500 µA
Standby Current Typ. 0.2 µA
Overcurrent Protection Typ. 1.9 A
Overvoltage Protection (OVP) Typ. 35 V
LED1-2 Current Accuracy ±1.5% (R1214Z2x1C/D, 20mA)
±2.0% (R1214Z2x1A/B, 20mA)
LED1-2 Current Matching Max. 0.5% (R1214Z2x1C/D, 20mA)
Max. 1.0% (R1214Z2x1A/B, 20mA)
Oscillator Frequency Typ. 750 kHz/ 450 kHz
Maximum Duty Cycle Typ. 96% (R1214Z211x)
Typ. 94% (R1214Z221x)
Nch ON Resistance Typ. 0.25 Ω (VIN = 3.6V)
Undervoltage Lockout (UVLO) Typ. 2.4 V
Thermal Shutdown Circuit Typ. 150°C
LED Dimming Control By sending a 200 Hz to 300 kHz PWM signal to the PWM pin
Package WLCSP-9-P1

APPLICATION INFORMATION

TYPICAL CHARACTERISTICS

R1214Z Efficiency vs. Output Current

PIN DESCRIPTION

WLCSP-9-P11.27 mm × 1.27 mm

WLCSP-9-P1

A1 ISET
A2 LED1
A3 LED2
B1 PWM
B2 COMP*
B3 GND
C1 CE
C2 VIN
C3 Lx

*) Error Amplifier Output Pin


R1214 Series for Consumer

APPLICATIONS

  • White LED backlight driver for LCD displays for portable equipment
  • White LED backlight driver for LCD displays for Smartphones, Tablets and Note PCs

PRODUCT LONGEVITY PROGRAM

R1214 series operate PRODUCT LONGEVITY PROGRAM.
This program has been introduced to help customers select the most appropriate part for applications that require long life cycles.


SELECTION GUIDE

The combinations of oscillator frequency, LED voltage and power controlling method are user-selectable options.

Product Name   Package Quantity per Reel
R1214Z2y1z-E2-F ConsumterPLP WLCSP-9-P1 5,000
2y1z y: Oscillator Frequency z: LED Voltage (ILED= 20 mA) z: Power Controlling Method
211A 450 kHz 320 mV PWM/ VFM Auto Switching
221A 750 kHz
211B 450 kHz 320 mV PWM
211C 450 kHz 600 mV PWM/ VFM Auto Switching
221C 750 kHz
211D 450 kHz 600 mV PWM

DOCUMENT/CONTACT

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Technical Support

Package *1 Marking Reliability *2
WLCSP-9-P1 R1214Z R1214Z

*1: The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and land pattern (foot pattern).
*2: Reliability file includes a reliability test report and a reflow profile.

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