IC manufacturers Nisshinbo Micro Device Inc.

IC manufacturers (99)

Nisshinbo Micro Device Inc. R1202

STEP-UP DC/DC CONVERTER with SHUTDOWN FUNCTION

Overview

TopologyBoost Converter
Input voltage-0.3-6.5 V
Switching frequency1000-1400 kHz
Output 112 V / 0.02 A
IC revision210322

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

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
ISAT,10%
(A)
ISAT,30%
(A)
RDC max.
(Ω)
fres
(MHz)
IRP,40K
(A)
MountIR
(A)
ISAT
(A)
RDC
(mΩ)
RDC typ.
(mΩ)
VOP
(V)
Q Samples
744032100SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-LQ SMT Inductor 10 0.65 20 SMT 0.32 0.85 120 35
74404032100SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-LQS SMT Power Inductor 10 37 SMT 0.84 0.87 230 120
74438335100SPEC
10 files Active i| Production is active. Expected lifetime: >10 years.WE-MAPI SMT Power Inductor 10 1.35 2.75 0.513 21 1.25 SMT 0.85 2 446 80
74438336100SPEC
10 files Active i| Production is active. Expected lifetime: >10 years.WE-MAPI SMT Power Inductor 10 1.55 3 0.322 18 1.65 SMT 1.2 2.35 280 80
78438335100SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-MAIA SMT Power Inductor 10 1.35 3 0.513 21 1.25 SMT 446
78438336100SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-MAIA SMT Power Inductor 10 1.55 3 0.322 18 1.65 SMT 280
74405031100SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-LQSH SMT High Saturation Power Inductor 10 0.474 21 SMT 0.85 1.45 395
74404031100A
7 files Active i| Production is active. Expected lifetime: >10 years.
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
ISAT,10%
(A)
ISAT,30%
(A)
RDC max.
(Ω)
fres
(MHz)
IRP,40K
(A)
MountIR
(A)
ISAT
(A)
RDC
(mΩ)
RDC typ.
(mΩ)
VOP
(V)
Q Samples