參數(shù)資料
型號(hào): TOP412G
廠商: POWER INTEGRATIONS INC
元件分類: 穩(wěn)壓器
英文描述: 0-21 W TOPSwitch using a 18-90 VDC input
中文描述: 2.9 A SWITCHING REGULATOR, 132 kHz SWITCHING FREQ-MAX, PDSO8
封裝: MS-001-AB, SMD-8
文件頁數(shù): 2/16頁
文件大小: 434K
代理商: TOP412G
TOP412/414
A
4/99
2
PI-1746-011796
SHUTDOWN/
AUTO-RESTART
PWM
COMPARATOR
CLOCK
SAW
OSCILLATOR
CONTROLLED
TURN-ON
GATE
DRIVER
INTERNAL
SUPPLY
5.7 V
4.7 V
SOURCE
S
R
Q
Q
DMAX
-
+
CONTROL
-
+
5.7 V
IFB
RE
ZC
VC
MINIMUM
ON-TIME
DELAY
+
-
VILIMIT
LEADING
EDGE
BLANKING
POWER-UP
RESET
R
S
Q
Q
÷
8
0
1
THERMAL
SHUTDOWN
EXTERNALLY
TRIGGERED
SHUTDOWN
SHUNT REGULATOR/
ERROR AMPLIFIER
+
-
DRAIN
Figure 2. Functional Block Diagram.
Pin Functional Description
DRAIN Pin:
Output MOSFET drain connection. Provides internal bias
current during start-up operation via an internal switched high-
voltage current source. Internal current sense point.
CONTROL Pin:
Error amplifier and feedback current input pin for duty cycle
control. Internal shunt regulator connection to provide internal
bias current during normal operation. Trigger input for latching
shutdown. It is also used as the supply bypass and auto-restart/
compensation capacitor connection point.
SOURCE Pin:
Output MOSFET source connection. Primary-side circuit
common, power return, and reference point.
Figure 3. Pin Configuration.
PI-2208-120798
CONTROL
8
5
7
6
DRAIN
SOURCE (HV RTN)
SOURCE
SOURCE
1
4
2
3
SOURCE (HV RTN)
SOURCE (HV RTN)
SOURCE
G Package (SMD-8)
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