NCP1051ST44T3G ON Semiconductor, NCP1051ST44T3G Datasheet - Page 2

• Manufacturer Part Number: NCP1051ST44T3G
• Description: IC CONV PWM UVLO HV SOT223-4
• Manufacturer: ON Semiconductor
• Type: Monolithic High Voltage Regulatorsr

Specifications of NCP1051ST44T3G

• Output Isolation: Isolated
• Frequency Range: 37 ~ 47kHz
• Voltage - Input: 7.5 ~ 10 V
• Voltage - Output: 700V
• Power (watts): 40W
• Operating Temperature: -40°C ~ 150°C
• Package / Case: TO-261-4, TO-261AA, SOT-223-4
• Input Voltage Range: - 0.3 V to + 10 V
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: NCP1051ST44T3GOS; NCP1051ST44T3GOS; NCP1051ST44T3GOSTR

Pin Function Description
(SOT−223)
Pin
1
2
4
−
3
Control Input
(PDIP−8)
3, 7, 8
Pin
1
2
4
5
+
AC Line
Input
V
CC
1
2
No Connection
Power Switch
Control Input
Function
Ground
Drain
V
CC
Regulator Circuit
Startup & V
Fault Detector
Power Switch Circuit Output
Gating Logic
Oscillator &
This is the positive supply voltage input. During startup, power is supplied to this input
from Pin 5. When V
allowed to begin switching with 1.0 V hysteresis on the V
nected to this pin programs fault timing and frequency modulation rate.
The Power Switch Circuit is turned off when a current greater than approximately 50 mA
is drawn out of or applied to this pin. A 10 V clamp is built onto the chip to protect the
device from ESD damage or overvoltage conditions.
This pin is the control circuit and Power Switch Circuit ground. It is part of the integrated
circuit lead frame.
This pin is designed to directly drive the converter transformer primary, and internally
connects to Power Switch and Startup Circuit.
Figure 1. Typical Application
+
CC
http://onsemi.com
Ground
2
CC
reaches V
Snubber
Power
Switch
Circuit
3, 7−8
5
CC
(on), the Startup Circuit turns off and the output is
Description
+
CC
pin. The capacitance con-
Converter
DC Output
+
−