NCP1205P ON Semiconductor, NCP1205P Datasheet - Page 4

• Manufacturer Part Number: NCP1205P
• Description: IC CTRLR PWM CM OVP UVLO HV 8DIP
• Manufacturer: ON Semiconductor

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

Demag
HV
FB
Ct
1
2
3
4
Ri
Lasts more than 128 ms?
----> Protection Circuitry
Last Pulse of Demag
Protection (OCP)
+
--
Over Current
V(--) < 1.5 V
+
DEMAG ?
--
after 4 ms
Rf
2.5 V
Figure 3. Internal Circuit Architecture for PDIP- -8 Version
V
V
err
err
1/3
Max = 3 V
Min = 10 mV
+
--
http://onsemi.com
Internal V
4
1 V
Current Comparator
CC
V
Startup
err
Internal Regulator
Max T
R
V
T
CO
off
Flip--Flop
Clock
Feedback
= f (V
off
D
= f (Ct)
err
OVP
)
Q
UVLO
Internal Clamp
UVLO
200 ns L.E.B
Driver
2.8 V
H
L
= 7.2 V
= 15 V
+
--
+
--
18 k
8
7
6
5
V
DRV
I
GND
sense
CC