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TC170COE PDF预览

TC170COE

更新时间: 2024-11-08 22:07:11
品牌 Logo 应用领域
TELCOM 开关光电二极管控制器
页数 文件大小 规格书
8页 106K
描述
CMOS CURRENT MODE PWM CONTROLLER

TC170COE 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:SO-16Reach Compliance Code:unknown
风险等级:5.79Is Samacsys:N
模拟集成电路 - 其他类型:SWITCHING CONTROLLER控制模式:CURRENT-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:16 V
最小输入电压:8 V标称输入电压:16 V
JESD-30 代码:R-PDSO-G16JESD-609代码:e0
功能数量:1端子数量:16
最高工作温度:70 °C最低工作温度:
最大输出电流:0.3 A封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装等效代码:SOP16,.4
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
认证状态:Not Qualified子类别:Switching Regulator or Controllers
最大供电电流 (Isup):3.8 mA表面贴装:YES
切换器配置:PUSH-PULL最大切换频率:200 kHz
技术:CMOS温度等级:COMMERCIAL
端子面层:Tin/Lead (Sn/Pb)端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
Base Number Matches:1

TC170COE 数据手册

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4
TC170  
CMOS CURRENT MODE PWM CONTROLLER  
FEATURES  
GENERAL DESCRIPTION  
Low Supply Current With  
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.  
CMOS Technology................................. 3.8mA Max  
Internal Reference .............................................5.1V  
Fast Rise/Fall Times (CL = 1000pF) ............. 50nsec  
Dual Push-Pull Outputs  
Direct-Power MOSFET Drive  
High Totem-Pole Output Drive .................... 300mA  
Differential Current-Sense Amplifier  
Programmable Current Limit  
Soft-Start Operation  
Double-Pulse Suppression  
Undervoltage Lockout  
Wide Supply Voltage Operation ...............8V to16V  
High Frequency Operation ..........................200kHz  
Available with Low OFF State Outputs  
Low Power, Pin-Compatible Replacement for UC3846  
ORDERING INFORMATION  
Temperature  
Part No.  
Package  
Range  
Other advantages inherent in current-mode control in-  
clude superior line and load regulation and automatic sym-  
metry correction in push-pull converters.  
TC170COE 16-Pin SOIC (Wide)  
0°C to +70°C  
TC170CPE 16-Pin Plastic DIP (Narrow) 0°C to +70°C  
FUNCTIONAL BLOCK DIAGRAM  
V
REF  
2
15  
5.1-VOLT  
REFERENCE  
V
IN  
13  
11  
TC170  
V
DD  
OUTPUT  
A (  
9
8
R
C
O
UNDERVOLTAGE  
LOCKOUT  
)
OSCILLATOR  
O
D Q  
C
Q
10  
3
SYNC  
× 3.15 CURRENT  
PWM  
(–) CURRENT  
SENSE INPUT  
AMPLIFIER  
+
R
COMPARATOR  
+
+
Q
14  
12  
OUTPUT  
B (  
4
(+) CURRENT  
SENSE INPUT  
S
S
)
0.75V  
7
GROUND  
COMP  
PWM LATCH  
LIMIT BUFFER  
AMPLIFIER  
V
DD  
100µA  
(+) ERROR  
AMP INPUT  
1
5
6
CURRENT LIMIT/  
+
+
SOFT-START ADJUST  
SHUTDOWN  
(–) ERROR  
AMP INPUT  
Q4  
ERROR  
AMPLIFIER  
SHUTDOWN  
COMPARATOR  
16  
350mV  
+
Q2  
Q1  
LOCK-UP  
AMPLIFIER  
+
350  
mV  
POSITIVE  
FEEDBACK  
6kΩ  
Q3  
3.5kΩ  
NOTE: Outputs low in  
OFF state.  
TC170-5 10/1/96  
TELCOM SEMICONDUCTOR, INC.  
4-119  

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