DatasheetsPDF.com

HT7936B

Holtek Semiconductor
Part Number HT7936B
Manufacturer Holtek Semiconductor
Description White LED Step-up Charge Pump Converter
Published Feb 7, 2010
Detailed Description HT7936A/HT7936B White LED Step-up Charge Pump Converter Features · Input voltage range: 2.8V to VOUT · Driving current: ...
Datasheet PDF File HT7936B PDF File

HT7936B
HT7936B

Overview
HT7936A/HT7936B White LED Step-up Charge Pump Converter Features · Input voltage range: 2.
8V to VOUT · Driving current: 110mA (HT7936A), · Oscillator frequency: 1MHz · Soft start function, current limit, 150mA (HT7936B) · Fixed output voltage: 5V (HT7936A), short circuit protection · Small outline SOT23-6 package 4.
5V (HT7936B) Applications · Cellular phones · PDAs · DSCs · Handheld devices · White LED display backlighting General Description The HT7936A and HT7936B are charge-pump type DC-DC step-up converter devices, which can generate regulated fixed output voltages of 5.
0V and 4.
5V.
Their high degree of functional integration requires only the addition of three external capacitors, namely a flying capacitor and an input and output capacitor, to implement a full step-up conversion function.
The devices have the additional benefit of an integrated soft start function to reduce the level of in-rush current during device power on.
The operating voltage range is from 2.
8V to the full output voltage value, VOUT.
To meet the demands of today¢s power sensitive applications, the devices, have a very low standby current value as well as the extra safety features of current limit and short circuit protection.
This range of device features, supplied in 6-pin SOT-23-6 package type, will ensure that these device will find excellent use in a wide range of DC-DC step-up converter applications.
Selection Table Part No.
HT7936A HT7936B Output Voltage 5.
0V 4.
5V Tolerance ±4% ±4% Package SOT23-6 SOT23-6 www.
DataSheet4U.
com Rev 1.
00 1 December 28, 2009 HT7936A/HT7936B Block Diagram C + V IN C - M 4 M 1 M 2 M 3 V O U T S h o r t C ir c u it P r o te c io n C o n tro l G N D E N V R E F 1 M H z O S C N o te : D u r in g o p e r a tio n th e fo llo w in g s e q u e n c e o c c u r s : 1 .
M 1 , M 3 O n / M 2 , M 4 O ff 2 .
M 2 , M 4 O n / M 1 , M 3 O ff Pin Assignment C + 6 V IN 5 C 4 T o p V ie w 1 V O U T 2 G N D 3 E N Pin Description www.
DataSheet4U.
com Pi...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)