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FAN7556N

Description
Switching Controller, Voltage-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDIP8, DIP-8
CategoryPower/power management    The power supply circuit   
File Size241KB,10 Pages
ManufacturerFairchild
Websitehttp://www.fairchildsemi.com/
Download Datasheet Parametric Compare View All

FAN7556N Overview

Switching Controller, Voltage-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDIP8, DIP-8

FAN7556N Parametric

Parameter NameAttribute value
MakerFairchild
Parts packaging codeDIP
package instructionDIP-8
Contacts8
Reach Compliance Codeunknown
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeVOLTAGE-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage30 V
Minimum input voltage10 V
Nominal input voltage18 V
JESD-30 codeR-PDIP-T8
length9.2 mm
Number of functions1
Number of terminals8
Maximum operating temperature125 °C
Minimum operating temperature-25 °C
Maximum output current1 A
Package body materialPLASTIC/EPOXY
encapsulated codeDIP
Encapsulate equivalent codeDIP8,.3
Package shapeRECTANGULAR
Package formIN-LINE
Certification statusNot Qualified
Maximum seat height5.08 mm
surface mountNO
Switch configurationSINGLE
Maximum switching frequency500 kHz
technologyBIPOLAR
Temperature levelOTHER
Terminal formTHROUGH-HOLE
Terminal pitch2.54 mm
Terminal locationDUAL
width7.62 mm
Base Number Matches1
www.fairchildsemi.com
FAN7556
Features
Voltage Mode PWM Controller
Description
The FAN7556 is a fixed frequency voltage mode PWM
controller. It is specially designed for off-line and DC-DC
converter applications with minimal external components.
These integrated circuits feature a trimmed oscillator for
precise duty cycle control, a temperature compensated
reference, an on/off control, a high gain error amplifier, a
current sensing comparator, and a high current totem-pole
output. The FAN7556 has various protection functions such
as an over load protection (OLP), an over current
protection(OCP), and an over voltage protection(OVP). The
FAN7556 is available in the 8DIP package as well as the
8SOP package.
8-DIP
Voltage Mode Control
Pulse by Pulse Current Limiting
Low External Components
Under Voltage Lockout ( UVLO): 9V/15V
Stand-by Current: Typ. 100uA
Power Saving Mode Current: Typ. 200uA
Operating Current: Typ. 7mA
Soft Start
On/off Control
Over Load Protection (OLP)
Over Current Protection (OCP)
Over Voltage Protection (OVP)
Wide Operating Frequency Range (20kHz ~ 500kHz)
Auto-Restart Function
Applications
• Off-Line & DC-DC Converter
1
8-SOP
1
Internal Block Diagram
CT
Vcc
6
+
34V
+
+
_
+
_
_
_
_
15/9V
CLK
OSC
14V
PWM
OVP
+
+
_
_
1k
0.3V
+
1.5V
1mA
3k
Vref
Vcc
5uA
OLP
COM-out
OVP-out
UVLO-out
+
S
R
Q
_
6V
+
+
_
_
S
Q
R
off
PWR
/
SAVE
Vref
7
4
COM
LA
1
2V
Vref
3.5V
100uA
S/S
8
2.7V
Q
R
S
©2002 Fairchild Semiconductor Corporation
_
_
_
FB
2
+
+
_
_
_
+
UVLO
on
5
OUT
OCP
3
0.25V
IS
4
GND
Rev. 1.0.1

FAN7556N Related Products

FAN7556N FAN7556MX
Description Switching Controller, Voltage-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDIP8, DIP-8 Switching Controller, Voltage-mode, 1A, 500kHz Switching Freq-Max, PDSO8, SOP-8
Maker Fairchild Fairchild
Parts packaging code DIP SOIC
package instruction DIP-8 SOP,
Contacts 8 8
Reach Compliance Code unknown unknown
ECCN code EAR99 EAR99
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER
control mode VOLTAGE-MODE VOLTAGE-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 30 V 30 V
Minimum input voltage 10 V 10 V
Nominal input voltage 18 V 18 V
JESD-30 code R-PDIP-T8 R-PDSO-G8
Number of functions 1 1
Number of terminals 8 8
Maximum operating temperature 125 °C 125 °C
Minimum operating temperature -25 °C -25 °C
Maximum output current 1 A 1 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code DIP SOP
Package shape RECTANGULAR RECTANGULAR
Package form IN-LINE SMALL OUTLINE
Certification status Not Qualified Not Qualified
Maximum seat height 5.08 mm 1.8 mm
surface mount NO YES
Switch configuration SINGLE SINGLE
Maximum switching frequency 500 kHz 500 kHz
Temperature level OTHER OTHER
Terminal form THROUGH-HOLE GULL WING
Terminal pitch 2.54 mm 1.27 mm
Terminal location DUAL DUAL
width 7.62 mm 3.95 mm
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