LX1732 Просмотр технического описания (PDF) - Microsemi Corporation
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LX1732 Datasheet PDF : 12 Pages
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INTEGRATED PRODUCTS
LX1732
High Current PFM Boost Converter
PRODUCTION DATA SHEET
APPLICATION CIRCUITS
VCO
IN
SHDN
Shutdown
VC
Ref = VBG/2
LBI
Logic
Control
Gate Driver
Current
Sense
Band Gap
VREF = 1.200V
Figure 2 – LX1732 Block Diagram
SW
GND
FB
LBO
VIN
20µF
10V
316KΩ
100KΩ
27µH
IN
SW
SHDN
VC
LX1732
LBI
FB
LBO
GND
UPS5817
316KΩ
VOUT
20µF
10V
100KΩ
Figure 3 – VOUT = 5.0V; IOUT = 150mA and VLBI = 2.5V
VIN
20µF
10V
100KΩ
100KΩ
27µH
IN
SW
SHDN
VC
LX1732
LBI
FB
LBO
GND
UPS5817
174KΩ
VOUT
20µF
10V
100KΩ
VIN
20µF
27µH
IN
SW
SHDN
VC
LX1732
LBI
FB
LBO
GND
UPS5817
20µF
237KΩ
100KΩ
15Ω
15Ω
15Ω
15Ω
15Ω
Figure 4 – VOUT = 3.2V; IOUT = 250mA and VLBI = 1.2V
Figure 5 – LX1732 driving 5 white LEDs in parallel
where VOUT > 3.6V; IOUT = 100mA.
Copyright © 2000
Rev. 1.1c, 2005-03-03
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
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