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參數資料
| 型號： | TOP234P |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數： | 3/36頁 |
| 文件大小： | 650K |
| 代理商： | TOP234P |
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TOP232-234
B
7/01
3
Figure 2. Functional Block Diagram.
Pin Functional Description
DRAIN (D) Pin:
High voltage power MOSFET drain output. The internal start-
up bias current is drawn from this pin through a switched high-
voltage current source. Internal current limit sense point for
drain current.
CONTROL (C) Pin:
Error amplifier and feedback current input pin for duty cycle
control. Internal shunt regulator connection to provide internal
bias current during normal operation. It is also used as the
connection point for the supply bypass and auto-restart/
compensation capacitor.
MULTI-FUNCTION (M) Pin:
Input pin for OV, UV, line feed forward with DC
reduction,
external set current limit, remote ON/OFF and synchronization.
A connection to SOURCE pin disables all functions on this pin
and makes
TOPSwitch-FX
operate in simple three terminal
mode (like
TOPSwitch-II
).
FREQUENCY (F) Pin: (Y package only)
Input pin for selecting switching frequency: 132 kHz if connected
to SOURCE pin and 66 kHz if connected to CONTROL pin.
Figure 3. Pin Configuration.
PI-2535-083099
The switching frequency is internally set for 132 kHz only
operation in P and G packages.
SOURCE (S) Pin:
Output MOSFET source connection for high voltage power
return. Primary side control circuit common and reference point.
SHUTDOWN/
AUTO-RESTART
COMPWM
CLOCK
SAW
HALF
OSCILLATOR WITH JITTER
CTURN-ON
GATE DRIVER
COMPARATOR
INTERNAL UV
COMPARATOR
INTERNAL
5.8 V
SOURCE (S)
S
R
Q
Q
DMAX
STOP
SOFT-
-
+
CONTROL (C)
MULTI-
FUNCTION (M)
FREQUENCY (F)
(Y Package Only)
-
+
5.8 V
IFB
RE
ZC
VC
+
-
LEDGE
BLANKING
÷
8
1
HYSTERETIC
THERMAL
SHUTDOWN
SHUNT REGULATOR/
ERROR AMPLIFIER
+
-
DRAIN (D)
ON/OFF
DCMAX
VBG
DCMAX
VBG + VT
0
OV/UV
V
I (LIMIT)
CURRENT
LIMIT
ADJUST
LINE
SENSE
SOFT START
PI-2501-031901
Tab Internally
Connected to SOURCE Pin
Y Package (TO-220-7B)
P Package (DIP-8B)
G Package (SMD-8B)
C
D
S
S
S
S
1
C
3
M
5
4
F
7
D
M
8
5
7
1
4
2
3
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| TOP234Y | 功能描述:交流/直流開關轉換器 45W 85-265 VAC 75W 230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| TOP234YN | 功能描述:交流/直流開關轉換器 45W 85-265 VAC 75W 230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
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| TOP242-249 | 制造商:POWERINT 制造商全稱:Power Integrations, Inc. 功能描述:Family Extended Power, Design Flexible,Integrated Off-line Switcher |
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