IC manufacturers Nisshinbo Micro Device Inc.
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Overview
| Topology | Boost Converter |
| Input voltage | -0.3-6.5 V |
| Switching frequency | 1000-1400 kHz |
| Output 1 | 12 V / 0.02 A |
| IC revision | 210322 |
Description
The R1202 Series are CMOS-based PWM step-up DC/DC converters, which are optimized to drive white LEDs and PMOLED with constant current. There are two types. The A/B versions are optimized for the general use or the drive of PMOLED, and the D version is optimized for the serial drive of white LED with constant current. The R1202 includes an under-voltage lockout circuit (UVLO), a soft-start circuit, and an over-voltage protection circuit (OVP), a thermal shutdown circuit. By simply using an inductor, divider resistors, and capacitors as external components, PMOLED and white LEDs can be driven with high efficiency. At the standby mode, the internal NPN transistor can separate the output from the input. (Shutdown function) The A/B version with auto-discharge function is selectable. D Version can set the LED current with feedback resistor (R1). The brightness of the LEDs and the soft-start time can be adjusted by applying a PWM signal (200Hz to 300kHz) to the CE pin. In addition to DFN1616-6B, 0.95mm thickness TSOT-23-6 is available.
Features
- Input Voltage Range: 2.3V to 5.5V (R1202xxxxA/B), 1.8V to 5.5V (R1202xxxxD)
- Supply Current: Typ. 800µA
- Standby Current: Max. 5µA
- Feedback Voltage: 1.0V±15mV (R1202xxxxA/B), 0.2V±10mV (R1202xxxxD)
- Oscillator Frequency: Typ. 1.2MHz
- Maximum Duty Cycle: Typ. 91%
- UVLO Function: Typ.2.0V (Hys.Typ.0.2V) (R1202xxxxA/B) Typ.1.6V (Hys.Typ.0.1V) (R1202xxxxD)
- Lx Current Limit Function: Select from 350mA, 700mA
- Over Voltage Protection: Select from 14V-23V (Refer the Selection Guide)
- LED dimming control for R1202xxxxD: by external PWM signal (Frequency 200Hz to 300kHz)
- Thermal Protection Function: Typ.150ºC(Hys.Typ.50ºC)
- Built-in Auto Discharge Function: R1202xxxxA
- NMOS ON Resistance: 1.35Ω
- Packages: DFN1616-6B, TSOT-23-6
Typical applications
- White LED Backlight for portable equipment
- • Constant Voltage Power Source for portable equipment, OLED power supply for portable equipment
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(Ω) | fres(MHz) | IRP,40K(A) | Mount | IR(A) | ISAT(A) | RDC(mΩ) | RDC typ.(mΩ) | VOP(V) | Q(%) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-LQ SMT Inductor, 10 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQ SMT Inductor | Inductance10 µH | – | – | DC Resistance0.65 Ω | Self Resonant Frequency20 MHz | – | MountSMT | Rated Current0.32 A | Saturation Current0.85 A | – | – | Operating Voltage120 V | Q-Factor35 % | ||||
 | WE-LQS SMT Power Inductor, 10 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQS SMT Power Inductor | Inductance10 µH | – | – | – | Self Resonant Frequency37 MHz | – | MountSMT | Rated Current0.84 A | Saturation Current0.87 A | DC Resistance230 mΩ | – | Operating Voltage120 V | – | ||||
 | WE-MAPI SMT Power Inductor, 10 µH, 1.35 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MAPI SMT Power Inductor | Inductance10 µH | Saturation Current @ 10%1.35 A | Saturation Current @ 30%2.75 A | DC Resistance0.513 Ω | Self Resonant Frequency21 MHz | Performance Rated Current1.25 A | MountSMT | Rated Current0.85 A | Saturation Current2 A | – | DC Resistance446 mΩ | Operating Voltage80 V | – | ||||
 | WE-MAPI SMT Power Inductor, 10 µH, 1.55 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MAPI SMT Power Inductor | Inductance10 µH | Saturation Current @ 10%1.55 A | Saturation Current @ 30%3 A | DC Resistance0.322 Ω | Self Resonant Frequency18 MHz | Performance Rated Current1.65 A | MountSMT | Rated Current1.2 A | Saturation Current2.35 A | – | DC Resistance280 mΩ | Operating Voltage80 V | – | ||||
 | WE-MAIA SMT Power Inductor, 10 µH, 1.35 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MAIA SMT Power Inductor | Inductance10 µH | Saturation Current @ 10%1.35 A | Saturation Current @ 30%3 A | DC Resistance0.513 Ω | Self Resonant Frequency21 MHz | Performance Rated Current1.25 A | MountSMT | – | – | – | DC Resistance446 mΩ | – | – | ||||
| WE-MAIA SMT Power Inductor, 10 µH, 1.55 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MAIA SMT Power Inductor | Inductance10 µH | Saturation Current @ 10%1.55 A | Saturation Current @ 30%3 A | DC Resistance0.322 Ω | Self Resonant Frequency18 MHz | Performance Rated Current1.65 A | MountSMT | – | – | – | DC Resistance280 mΩ | – | – | ||||
 | WE-LQSH SMT High Saturation Power Inductor, 10 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQSH SMT High Saturation Power Inductor | Inductance10 µH | – | – | DC Resistance0.474 Ω | Self Resonant Frequency21 MHz | – | MountSMT | Rated Current0.85 A | Saturation Current1.45 A | – | DC Resistance395 mΩ | – | – |