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IC-Hersteller RICOH Electronic Devices Co., Ltd.

RICOH Electronic Devices Co., Ltd. R1202

STEP-UP DC/DC CONVERTER with SHUTDOWN FUNCTION

Details

TopologieAufwärtswandler
Eingangsspannung-0.3-6.5 V
Schaltfrequenz1000-1400 kHz
Ausgang 112 V / 0.02 A
IC-Revision210322

Beschreibung

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.

Eigenschaften

  • 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

Typische Anwendungen

  • • Constant Voltage Power Source for portable equipment, OLED power supply for portable equipment
  • White LED Backlight for portable equipment

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieL
(µH)
IR
(A)
ISAT
(A)
RDC
(mΩ)
RDC max.
(Ω)
fres
(MHz)
MontageartRDC
(mΩ)
Q
(MHz)
Muster
744032100SPEC
8 Dateien WE-LQ SMT-Induktivität 10 0.32 0.85 0.65 20 SMT 35
74404032100SPEC
8 Dateien WE-LQS SMT-Speicherdrossel 10 0.84 0.87 33 SMT 230
74438335100SPEC
8 Dateien WE-MAPI SMT-Speicherdrossel 10 0.85 2 446 0.513 21 SMT
74438336100SPEC
8 Dateien WE-MAPI SMT-Speicherdrossel 10 1.2 2.35 280 0.322 18 SMT
78438335100SPEC
8 Dateien WE-MAIA SMT Speicherdrossel 10 0.85 2 446 0.513 21 SMT
78438336100SPEC
8 Dateien WE-MAIA SMT Speicherdrossel 10 1.2 2.35 280 0.322 18 SMT
74404031100ASPEC
8 Dateien WE-LQS SMT-Speicherdrossel 10 1.03 0.58 58 SMT 254
74405031100SPEC
8 Dateien WE-LQSH SMT Semi-Shielded High Saturation Power Inductor 10 0.85 1.45 395 0.474 21 SMT
Muster
Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieL
(µH)
IR
(A)
ISAT
(A)
RDC
(mΩ)
RDC max.
(Ω)
fres
(MHz)
MontageartRDC
(mΩ)
Q
(MHz)
Muster