NCP1205P ON Semiconductor, NCP1205P Datasheet - Page 2
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NCP1205P
Manufacturer Part Number
NCP1205P
Description
IC CTRLR PWM CM OVP UVLO HV 8DIP
Manufacturer
ON Semiconductor
Datasheet
1.NCP1205DR2.pdf
(17 pages)
Specifications of NCP1205P
Output Isolation
Isolated
Frequency Range
90 ~ 125kHz
Voltage - Input
8 ~ 36 V
Voltage - Output
12V
Operating Temperature
-25°C ~ 150°C
Package / Case
8-DIP (0.300", 7.62mm)
Number Of Outputs
1
Output Current
250 mA
Mounting Style
Through Hole
Switching Frequency
125 KHz
Operating Supply Voltage
30 V
Maximum Operating Temperature
+ 125 C
Fall Time
30 ns
Minimum Operating Temperature
- 25 C
Rise Time
30 ns
Synchronous Pin
No
Topology
Flyback, Forward
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
NCP1205POS
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1. PDIP--14 has different pinouts. Please see Pin Connections.
2. Pin 2, 7, 8, 9 and 14 are nonconnected on PDIP--14.
3. Pin 2, 3, 8, 9, 10, 15 and 16 are nonconnected on SOIC--16.
PIN FUNCTION DESCRIPTION
PDIP- -8
NA
Demag
1
2
3
4
5
6
7
8
HV
FB
Ct
PDIP- -14
Pin No.
1
2
3
4
10
12
13
11
1
3
4
5
6
PDIP- -8
SOIC- -16
11
12
13
14
1
4
5
6
7
8 V
7 Drive
6 Isense
5 GND
CC
Pin Name
Demag
Isense
GND
OVP
V
Drv
HV
FB
Ct
CC
Startup rail
Zero primary--current
detection
Feedback signal to
control the PWM
Timing capacitor
The IC’s ground
Overvoltage input
The primary--current
sensing pin
This pin drives the
external switcher
Powers the IC
Demag
OVP
Function
NC
NC
HV
FB 4
PIN CONNECTIONS
Ct
http://onsemi.com
1
2
3
5
6
7
PDIP- -14
2
14
13
12
10
11
9
8
Connected to the rectified HV rail, this pin provides a
charging path to V
This pin ensures the restart of the main switcher when
operating in free--run.
This level modulates the peak current level in free--running
operation and modulates the frequency in VFM operation.
By adding a capacitor from Ct to the ground, the user selects
the minimum/maximum operating frequency.
By applying a 2.8 V typical level on this pin, the IC is
permanently latched--off until V
This pin senses the primary current via an external shunt
resistor.
The IC is able to deliver or absorb 250 mA peak currents
while delivering a clamped driving signal.
A positive voltage up to 30 V maximum can be applied upon
this pin before the IC stops.
NC
V
Drive
Isense
GND
NC
NC
CC
CC
Demag
bulk capacitor.
OVP
Description
NC
NC
NC
HV
FB
Ct
--
1
2
3
4
5
6
7
8
CC
falls below UVLO
SOIC- -16
16
15
14 V
13 Drive
10
12 Isense
11 GND
9
NC
NC
NC
NC
L
CC
.