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PDF FAN5332A Data sheet ( Hoja de datos )
| Número de pieza | FAN5332A | |
| Descripción | High Current Serial LED Driver and OLED Supply | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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August 2005
FAN5332A
High Efficiency, High Current Serial LED Driver and OLED
www.datasheet4u.com
Supply with 30V Integrated Switch
Features
■ 1.5MHz Switching Frequency
■ Low Noise
■ Adjustable Output Voltage
■ Up to 1.5A Peak Switch Current
■ 1.5W Output Power Capability
■ Low Shutdown Current: <1µA
■ Cycle-by-Cycle Current Limit
■ Over-Voltage Protection
■ Fixed -Frequency PWM Operation
■ Soft Start
■ Internal Compensation
■ Thermal Shutdown
■ 5-lead SOT-23 Package
Applications
■ Cell Phones
■ PDAs
■ Handheld Equipment
■ Display Bias
■ LED Bias
■ Flash LED
Description
The FAN5332A is an LED driver that features fixed frequency
mode operation and an integrated FET switch. The device’s
high output power makes it suitable to drive flash LEDs in serial
connections. This device is designed to operate at high switch-
ing frequencies in order to minimize switching noise measured
at the battery terminal of hand-held communications equipment.
Quiescent current in both normal and shutdown mode is
designed to be minimal in order to extend battery life. Normal or
shutdown mode can be selected by a logic level shutdown cir-
cuitry.
The low ON-resistance of the internal N-channel switch ensures
high efficiency and low power dissipation. A cycle-by-cycle cur-
rent limit circuit keeps the peak current of the switch below a
typical value of 1.5A. The FAN5332A is available in a 5-lead
SOT23 package.
Typical Application
VIN 2.7V to 5.5V
CIN
10µF
5
VIN
L
6.8µH
SW 1
BAT54
R1
3
FB
ON
OFF
4 SHDN
2
GND
R2
CF
82pF
VOUT
COUT
2.2µF
Figure 1. Typical Application Diagram
©2004 Fairchild Semiconductor Corporation
FAN5332A Rev. 1.0.1
1
www.fairchildsemi.com
1 page  
Typical Performance Characteristics
TA = 25°C, CIN = 10µF, COUT = 2.2µF, L = 6.8µH, unless otherwise noted.
www.datasheet4u.com22
21
ROUT = 275Ω
Line Regulation
20
19
18
2.5
TA = 25°C
TA = 85°C
TA = -40°C
3.0 3.5 4.0 4.5 5.0 5.5
Battery Voltage (V)
Full Load Efficiency
90
ROUT = 275Ω
80
70
60
50
2.5
TA = -40°C
TA = 25°C
T A = 85°C
3.0 3.5 4.0 4.5 5.0 5.5
Battery Voltage (V)
No Load Battery Current vs. Battery Voltage
6
TA = 25°C
5
4
TA = 85°C
3
TA = -40°C
2
1
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
Battery Voltage (V)
85
80
75
70
65
60
2.5
Light Load Efficiency
I Load = 20mA
I Load = 10mA
3.0 3.5 4.0 4.5 5.0
Battery Voltage (V)
5.5
Load Transient Response
VIN = 3.6V
Load Regulation
VOUT = 20.7V
ROUT = 275Ω
VIN = 3.6V
Start-Up Response
0mA
75 mA
Time (100µs/div )
Tim e (500µs/div)
FAN5332A Rev. 1.0.1
5
www.fairchildsemi.com
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet FAN5332A.PDF ] | |
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