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STLD20D

Features: High efficiency above 80% Can drive up to 4 LEDs in series from 2.8V supply Constant LED current regulation Integrated LED disconnect switch that cuts the LEDs branch in shutdown mode Constant switching frequency Stable current regulation across the total input voltage range Supply volt...

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SeekIC No. : 004508106 Detail

STLD20D: Features: High efficiency above 80% Can drive up to 4 LEDs in series from 2.8V supply Constant LED current regulation Integrated LED disconnect switch that cuts the LEDs branch in shutdown mode Con...

STLD20D Data Sheet

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Part Number:
STLD20D
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/12/26

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Product Details

Description



Features:

High efficiency above 80%
Can drive up to 4 LEDs in series from 2.8V supply
Constant LED current regulation
Integrated LED disconnect switch that cuts the LEDs branch in shutdown mode
Constant switching frequency
Stable current regulation across the total input voltage range
Supply voltage rejection
Inherent soft start by limiting the peak inductor current
Peak inductor current adjustability (STLD20DC8 only)
Shutdown pin with possibility of PWM dimming control
Over voltage and over temperature protection with automatic restart
Low shutdown current < 1A
Small external inductor (10H, height < 2mm)
Tiny ceramic external capacitor
Can be supplied by a Li-ion battery - VIN range:2.5Vdc to 5Vdc


Application

White Led supply for LCD backlight
Mobile phone
PDA and organizers
Any handsets powered from 2.8V to 4.2V


Pinout

Connection Diagram


Specifications

Symbol Parameter Test conditions Value Unit
Min. Typ. Max.
VIN Supply voltage range 2.5   5 V
VESD ESD ratings HBM MIL STD 883C 2     kV
TOP Operating temperature - 40   + 85
Tstg Storage temperature - 65   150
BVDS Breakdown voltage at pin SW and TSS and VOUT 20     V
SHDN Maximum voltage applied on SHDN pin     VIN V



Description

The STLD20D is a constant switching frequency boost regulator with specific features to supply up to 4 white LEDs in series. A stable LED current regulation, from 2.8V to 4.2V, is achieved by sensing the LED current through a low hmic shunt resistor RLED (see figure 1). The device also includes a supply rejection circuit that prevent any kind of flickering effect on the display during dynamic supply voltage variation. A LED disconnect switch cut the LED branch to reduce the current consumption in shutdown mode. The maximum peak inductor current can be programmed. The STLD20D includes often numerous features and innovative design circuit that allows getting an efficiency above 80% across the total supply voltage range.




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