NCP1252ADR2G ON Semiconductor, NCP1252ADR2G Datasheet - Page 2

• Manufacturer Part Number: NCP1252ADR2G
• Description: IC PWM CTLR CURRENT MODE 8-SOIC
• Manufacturer: ON Semiconductor

Specifications of NCP1252ADR2G

• Frequency - Max: 500kHz
• Pwm Type: Current Mode
• Number Of Outputs: 1
• Duty Cycle: 50%
• Voltage - Supply: 9 V ~ 28 V
• Buck: No
• Boost: No
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -25°C ~ 125°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Duty Cycle (max): 48 %
• Mounting Style: SMD/SMT
• Switching Frequency: 92 KHz to 550 KHz
• Maximum Operating Temperature: + 125 C
• Fall Time: 22 ns
• Rise Time: 26 ns
• Synchronous Pin: No
• Topology: Flyback, Forward
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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.
Table 1. PIN FUNCTIONS
Table 2. MAXIMUM RATINGS TABLE
R
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
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
Figure 1. Typical Application
8
7
6
5
Rating
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
100 nF*
*Minimum recommended
decoupling capacitor value
2
Vcc
< 20 mA
Pin Description
−60 to +150
−0.3 to 10
Value
180
150
200
1.8
30
28
20
Vout
°C/W
Unit
mA
°C
°C
kV
V
V
V
V