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参数资料
| 型号： | TC170COERT |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | SOIC-16 |
| 文件页数： | 1/11页 |
| 文件大小： | 85K |
| 代理商： | TC170COERT |
TC170
TC170-5 10/7/99
2001 Microchip Technology Inc.
DS21395A
CMOS CURRENT MODE PWM CONTROLLER
FEATURES
s
Low Supply Current With
CMOS Technology ................................. 3.8mA Max
s
Internal Reference ............................................. 5.1V
s
Fast Rise/Fall Times (CL = 1000pF) ............. 50nsec
s
Dual Push-Pull Outputs
s
Direct-Power MOSFET Drive
s
High Totem-Pole Output Drive .................... 300mA
s
Differential Current-Sense Amplifier
s
Programmable Current Limit
s
Soft-Start Operation
s
Double-Pulse Suppression
s
Undervoltage Lockout
s
Wide Supply Voltage Operation .............. 8V to 16V
s
High Frequency Operation .......................... 200kHz
s
Available with Low OFF State Outputs
s
Low Power, Pin-Compatible Replacement for
UC3846
ORDERING INFORMATION
Temperature
Part No.
Package
Range
TC170COE
16-Pin SOIC (Wide)
0
°C to +70°C
TC170CPE
16-Pin PDIP (Narrow)
0
°C to +70°C
GENERAL DESCRIPTION
The TC170 brings low-power CMOS technology to the
current-mode-switching power supply controller market.
Maximum supply current is 3.8 mA. Bipolar current-mode
control integrated circuits require five times more operating
current.
The dual totem-pole CMOS outputs drive power
MOSFETs or bipolar transistors. The 50nsec typical output
rise and fall times (1000pF capacitive loads) minimize
MOSFET power dissipation. Output peak current is 300mA.
The TC170 contains a full array of system-protection
circuits (see features).
Current-mode control lets users parallel power supply
modules. Two or more TC170 controllers can be slaved
together for parallel operation. Circuits can operate from a
master TC170 internal oscillator or an external system
oscillator.
The TC170 operates from an 8V to 16V power supply.
An internal 2%, 5.1V reference minimizes external compo-
nent count. The TC170 is pin compatible with the Unitrode
UC1846/2846/3846 bipolar controller.
Other advantages inherent in current-mode control in-
clude superior line and load regulation and automatic sym-
metry correction in push-pull converters.
+
–
5.1-VOLT
REFERENCE
OSCILLATOR
× 3.15 CURRENT
AMPLIFIER
PWM
COMPARATOR
POSITIVE
FEEDBACK
15
9
10
3
4
7
5
8
6
VIN
SYNC
(–) CURRENT
SENSE INPUT
(+) CURRENT
SENSE INPUT
COMP
(+) ERROR
AMP INPUT
(–) ERROR
AMP INPUT
ERROR
AMPLIFIER
100
A
0.75V
LIMIT BUFFER
AMPLIFIER
Q4
350mV
LOCK-UP
AMPLIFIER
Q3
Q1
Q2
3.5k
SHUTDOWN
COMPARATOR
350
mV
6k
SHUTDOWN
CURRENT LIMIT/
SOFT-START ADJUST
NOTE: Outputs low in
OFF state.
16
1
S
R
Q
C
DQ
Q
GROUND
VDD
OUTPUT
A (
)
12
14
11
13
PWM LATCH
TC170
VREF
2
–
+
RO
CO
VDD
+
–
+
–
+
–
+
–
UNDERVOLTAGE
LOCKOUT
OUTPUT
B (
)
FUNCTIONAL BLOCK DIAGRAM
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC170CPE | 制造商:TELCOM 制造商全称:TelCom Semiconductor, Inc 功能描述:CMOS CURRENT MODE PWM CONTROLLER |
| TC170EI10 | 功能描述:COVER RCWAY TC170 LG IVR10' RoHS:否 类别:线缆，导线 - 管理 >> 线槽，走线系统 - 附件 系列:Pan-Way™ 标准包装:1 系列:PANDUCT® 附件类型:盖 - 线管 适用于相关产品:Panduit 导管 H 型 高度:- 宽:4"（101.6mm） 长度:36.0"（914.4mm） 颜色:黑 其它名称:298-HC4BL36 |
| TC170EI6 | 功能描述:COVER RCWAY TC170 LG IVR 6' RoHS:否 类别:线缆，导线 - 管理 >> 线槽，走线系统 - 附件 系列:Pan-Way™ 标准包装:1 系列:PANDUCT® 附件类型:盖 - 线管 适用于相关产品:Panduit 导管 H 型 高度:- 宽:4"（101.6mm） 长度:36.0"（914.4mm） 颜色:黑 其它名称:298-HC4BL36 |
| TC170EI8 | 功能描述:COVER RCWAY TC170 LG IVR(8=8') RoHS:否 类别:线缆，导线 - 管理 >> 线槽，走线系统 - 附件 系列:Pan-Way™ 标准包装:1 系列:PANDUCT® 附件类型:盖 - 线管 适用于相关产品:Panduit 导管 H 型 高度:- 宽:4"（101.6mm） 长度:36.0"（914.4mm） 颜色:黑 其它名称:298-HC4BL36 |
| TC170IG10 | 功能描述:COVER RCWAY TC170 LG GY10' RoHS:否 类别:线缆，导线 - 管理 >> 线槽，走线系统 - 附件 系列:Pan-Way™ 标准包装:1 系列:PANDUCT® 附件类型:盖 - 线管 适用于相关产品:Panduit 导管 H 型 高度:- 宽:4"（101.6mm） 长度:36.0"（914.4mm） 颜色:黑 其它名称:298-HC4BL36 |
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