ST1937 STANSON [Stanson Technology], ST1937 Datasheet

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ST1937

Manufacturer Part Number
ST1937
Description
DC-DC Step-Up Converter for White LED Driver
Manufacturer
STANSON [Stanson Technology]
Datasheet
1.ST1937.pdf (6 pages)

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Meier Automation Equipment Co., Limited Meier Automation Equipment Co., Limited
Part Number:
ST1937
Manufacturer:
STANSON
Quantity:
20 000
Company:
BOSTOCK HK LIMITED BOSTOCK HK LIMITED
Part Number:
ST1937S25RG
Manufacturer:
ST
0
Company:
Meier Automation Equipment Co., Limited Meier Automation Equipment Co., Limited
Part Number:
ST1937S25RG
Manufacturer:
ST
Quantity:
20 000
Company:
BOSTOCK HK LIMITED BOSTOCK HK LIMITED
Part Number:
ST1937S25RGB
Manufacturer:
ST
0
DESCRIPTION
ST1937 is a step-up DC/DC converter for white LED driver with constant current. The device
can driver one to four LEDs in series from a single cell Lithium ion battery. Internal functions
include current limiting; thermal shutdown and soft-start to prevent damage operate status.
ST1937 DC/DC converter operates at 1.2MHz and low output capacitor as small as 0.22uF;
apply to Lithium-Ion powered systems. A low 100mV reference voltage minimizes power loss
in the current setting resistor for better efficiency.
PIN CONFIGURATION
SOT23-5L
PART MARKING
ORDERING INFORMATION
※ Week Code : A ~ Z( 1 ~ 26 ) ; a ~ z( 27 ~ 52 )
※ ST1937S25RG : S25 : SOT-23-5 ; R : Tape Reel ; G : Pb – Free
※ ST1937S35RG : S35 : SOT-353 ; R : Tape Reel ; G : Pb – Free
STANSON TECHNOLOGY
120 Bentley Square, Mountain View, Ca 94040 USA
www.stansontech.com
Part Number
ST1937S25RG
ST1937S35RG
SOT-353 ( SC-70-5L )
SOT-353 ( SC-70-5L )
SOT-23-5L
Package
DC-DC Step-Up Converter for White LED Driver
APPLICATIONS
FEATURES
Battery Powered Devices
Digital Camera
PDA
GPS
Hand Held Communication Equipment
MP3/4
Fast 1.2MHz Switching Frequency
High Efficiency up to 85%
Drives up to Four LEDs From 3.2V
Supply
Low Quiescent Current
Internal Over Temperature and Current
Limiting Shutdown Function
Internal Soft-Start Circuit
Available in a Small SOT-23-5L &
SOT-353 Package
Part Marking
37YW
37YW
ST1937 2005. V1
ST1937

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ST1937 Summary of contents

Page 1

... ST1937S35RG SOT-353 ( SC-70-5L ) ※ Week Code : ※ ST1937S25RG : S25 : SOT-23 Tape Reel ; – Free ※ ST1937S35RG : S35 : SOT-353 ; R : Tape Reel ; – Free STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA www.stansontech.com DC-DC Step-Up Converter for White LED Driver ...

Page 2

... Bentley Square, Mountain View, Ca 94040 USA www.stansontech.com DC-DC Step-Up Converter for White LED Driver Description Switch Pin. Ground Pin Feedback Pin. Shutdown Pin. Active-low enable Supply Voltage Input Description Switch Pin. Ground Pin Feedback Pin. Shutdown Pin. Active-low enable Ground Pin Supply Voltage Input ST1937 ST1937 2005. V1 ...

Page 3

... The IC has a protection circuit against static electricity. Do not apply high static electricity or high voltage that exceeds the performance of the protection circuit to the IC. STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA www.stansontech.com DC-DC Step-Up Converter for White LED Driver Parameter ST1937 Value Unit -40～85 ℃ 125 ℃ -65～150 ℃ ST1937 2005. V1 ...

Page 4

... Bentley Square, Mountain View, Ca 94040 USA www.stansontech.com DC-DC Step-Up Converter for White LED Driver Conditions Min. Typ. Max. Unit 2.4 ISW=100mA, Duty Cycle = 66% Rin=10MΩ VSHDN > 0V VSHDN = 0V 0.8 VSW= 5V ISW = 50mA 1.5 ST1937 100 100 nA 2.8 3.5 mA 0.1 1.0 μA 1.2 1.6 MHz 85 % 320 mA 0.01 5 μA 150 0.4 V ST1937 2005. V1 ...

Page 5

... SOT-23-5L PACKAGE OUTLINE STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA www.stansontech.com ST1937 DC-DC Step-Up Converter for White LED Driver ST1937 2005. V1 ...

Page 6

... SOT-353 PACKAGE OUTLINE STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA www.stansontech.com ST1937 DC-DC Step-Up Converter for White LED Driver ST1937 2005. V1 ...

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