NCP1252 ON Semiconductor, NCP1252 Datasheet - Page 2

• Manufacturer Part Number: NCP1252
• Description: Flyback Applications
• Manufacturer: ON Semiconductor

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Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. This device series contains ESD protection and exceeds the following tests: Human Body Model 1800 V per JEDEC Standard
2. This device contains latch−up protection and exceeds 100 mA per JEDEC Standard JESD78.
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Table 1. PIN FUNCTIONS
Table 2. MAXIMUM RATINGS TABLE
Table 3. ORDERING INFORMATION
Specification Brochure, BRD8011/D.
R
NCP1252ADR2G
NCP1252BDR2G
Pin No.
Symbol
JESD22−A114E. Machine Model Method 200 V per JEDEC Standard JESD22−A115A.
θJ−A – SO
TJ
V
V
I
1
2
3
4
5
6
7
8
Vcc
MAX
CC
CC
Pin Name
SSTART
Device
GND
V
Drv
BO
CS
FB
R
Power Supply voltage, Vcc pin, transient voltage: 10 ms with I
CC
T
Vbulk
Maximum voltage on low power pins (except pin 6, 7)
Power Supply voltage, Vcc pin, continuous voltage
Thermal Resistance Junction−to−Air – SO8
Brown−out input
Timing element
Current sense
Maximum current injected into pin 7
Feedback
Soft−start
Function
Maximum Junction Temperature
ESD Capability, Machine Model
Driver
Storage Temperature Range
1
2
3
4
V
(Notes 1 and 2)
ESD Capability, HBM model
NCP1252
−
CC
8
7
6
5
Rating
A version
B version
Version
http://onsemi.com
This pin directly connects to an optocoupler collector.
This pin monitors the input voltage image to offer a Brown−out protection.
Monitors the primary current and allows the selection of the ramp com-
pensation amplitude.
A resistor connected to ground fixes the switching frequency.
The controller ground pin.
This pin connects to the MOSFET gate
This pin accepts voltage range from 8 V up to 28 V
A capacitor connected to ground selects the soft−start duration. The soft
start is grounded during the delay timer
Vcc
2
Vcc
Marking
< 20 mA
1252A
1252B
Pin Description
−60 to +150
−0.3 to 10
Value
180
150
200
1.8
30
28
20
Vout
2500/Tape & Reel
2500/Tape & Reel
Shipping
†
°C/W
Unit
mA
°C
°C
kV
V
V
V
V