R1214 Series
PWM/VFM Step-up DC/DC Converter for White LED
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Description
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.
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Spec
Consumer Input Voltage Range 2.7 V to 5.5 V (6.5 V) Operating Temperature Range -40°C to 85°C (125°C) Supply Current Typ. 500 µA Standby Current Typ. 0.2 µA Output Voltage Range Externally Adjustable: Max. 29 V Driver ON-resistance Typ. 0.25 Ω (VIN = 3.6 V) Oscillator Frequency Typ. 750 kHz, 450 kHz Maximum Duty Cycle Typ. 96% (R1214Z211x)
Typ. 94% (R1214Z221x)Package WLCSP-9-P1 LED電流精度 ±2.0% (R1214ZxxxA/B)
±1.5% (R1214ZxxxC/D)Protections / Functions
TSD ILX OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust -
Technical
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Typical Application
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R1214Z Efficiency vs. Output Current
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Related Links
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Quality &
PackagesProduct Name Compatibility Package Marking Reliability R1214Z2x1x-E2-F WLCSP-9-P1 See datasheet R1214Z-F - Refer to the datasheets for the details on the product.
- The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
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Sample / Buy
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Buy Online
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Buy, Request for Samples, Request for Information Materials
Authorized Distributors
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
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Functional Description
TSD | Thermal Shutdown Function |
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ILX | LX Current Limit Function |
OCP | Overcurrent Protection |
OVP | Overvoltage Protection |
UVLO | Undervoltage Lockout Protection |
OVLO | Overvoltage Lockout Protection |
Reverse | Reverse Current Protection Circuit |
Shutdown | Shutdown Function |
Soft Start | Soft Start Function |
SSCG | Spread Spectrum Clock Generator Function |
PGOOD | Power Good Output |
Auto Discharge | Auto Discharge Function |
Anti-ringing | Anti-ringing Switch Function |
Sequencing | Start-up Sequencing Control |
Max Duty | Maximum Duty Cycle |
Ext. Phase | Externally Adjustable Phase Compensation |
LED Adjust | LED High-speed Dimming Control |