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零件编号 | KA7500C | ||
描述 | SMPS Controller | ||
制造商 | Fairchild | ||
LOGO | |||
1 Page
KA7500C
SMPS Controller
www.fairchildsemi.com
Features
• Internal Regulator Provides a Stable 5V Reference Supply
Trimmed to ±1% Accuracy.
• Uncommitted Output TR for 200mA Sink or Source
Current
• Output Control for Push-Pull or Single-Ended Operation
• Variable Duty Cycle by Dead Time Control (Pin 4)
Complete PWM Control Circuit
• On-Chip Oscillator With Master or Slave Operation
• Internal Circuit Prohibits Double Pulse at Either Output
Description
The KA7500C is used for the control circuit of the pulse
width modulation switching regulator. The KA7500C
consists of 5V reference voltage circuit, two error amplifiers,
flip flop, an output control circuit, a PWM comparator, a
dead time comparator and an oscillator. This device can be
operated in the switching frequency of 1kHz to 300kHz. The
precision of voltage reference (Vref) is improved up to ±1%
with trimming. This provides a better output voltage
regulation. The operating temperature range is
-25°C ~ +85°C.
16-DIP
Internal Block Diagram
RT 6
CT 5
OSCILLATOR
1
16-SOP
1
OUTPUT CONTROL
13
DQ
DEAD 4
TIME
CONTROL
1.2V
CK Q
EA(+) 1
EA(-) 2
+
_1
EA(+) 16
EA(-) 15
+
2
_
PWM
COMP
0.7MA
3 COMP INPUT
5V
BAND GAP
REFERENCE
©2003 Fairchild Semiconductor Corporation
8 C1
9 E1
11 C2
10 E2
12 VCC
14 VREF
7 GND
Rev. 1.0.1
KA7500C
Ordering Information
Product Number
KA7500C
KA7500CD
Package
16-DIP
16-SOP
Operating Temperature
-25 ~ +85°C
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
5/9/03 0.0m 001
Stock#DSxxxxxxxx
2003 Fairchild Semiconductor Corporation
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页数 | 8 页 | ||
下载 | [ KA7500C.PDF 数据手册 ] |
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