NCP1011(2010) データシートの表示（PDF） - ON Semiconductor
部品番号
コンポーネント説明
一致するリスト
NCP1011
(Rev.:2010)
(Rev.:2010)
ON Semiconductor
NCP1011 Datasheet PDF : 24 Pages
| |||
NCP1010, NCP1011, NCP1012, NCP1013, NCP1014
PIN FUNCTION DESCRIPTION
Pin No.
(SOT--223)
Pin No.
(PDIP--7,
PDIP--7/Gull Wing)
Pin Name
1
1
VCC
--
2
NC
--
3
GND
2
4
FB
3
5
Drain
--
--
--
--
7
GND
4
8
GND
Function
Powers the Internal Circuitry
--
The IC Ground
Feedback Signal Input
Drain Connection
--
The IC Ground
The IC Ground
Description
This pin is connected to an external capacitor of typic-
ally 10 mF. The natural ripple superimposed on the
VCC participates to the frequency jittering. For im-
proved standby performance, an auxiliary VCC can be
connected to Pin 1. The VCC also includes an active
shunt which serves as an opto fail--safe protection.
--
--
By connecting an optocoupler to this pin, the peak
current setpoint is adjusted accordingly to the output
power demand.
The internal drain MOSFET connection.
--
--
--
VCC 1
VCC
Vclamp*
IVCC
I?
Startup Source
Iref = 7.4 mA --
Drain
IVCC
+
UVLO
Management
High when VCC < 3 V
S
R
Q
Rsense
250 ns
L.E.B.
NC 2
4V
EMI Jittering
GND 3
18 k
Error flag armed?
FB 4
Overload?
65, 100 or
130 kHz
Clock
Reset
Set Flip--Flop Q
DCmax = 65%
Reset
Driver
VCC
--
+
0.5 V
+
Startup Sequence --
Soft--Start Overload
Drain
*Vclamp = VCCOFF + 200 mV (8.7 V Typical)
Figure 2. Simplified Internal Circuit Architecture
8 GND
7 GND
5 Drain
http://onsemi.com
3
Share Link: