NCP1234
NCP1234 is Fixed Frequency Current Mode Controller manufactured by onsemi.
imer- based fault detection that ensures the detection of overload independently of an auxiliary winding, and an adjustable pensation to help keep the maximum power independent of the input voltage.
Finally, due to a careful design, the precision of critical parameters is well controlled over the entire temperature range (- 40°C to +125°C).
Features
- Fixed- Frequency Current- Mode Operation with Built- In Ramp
34Xff ALYWX
G 1
34Xff = Specific Device Code X = A or B ff = 65 or 100
A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb- Free Package pensation
- 65 k Hz or 100 k Hz Oscillator Frequency version
PIN CONNECTIONS
- Frequency Foldback then Skip Mode for Maximized Performance in
Latch 1
8 HV
Light Load and Standby Conditions
FB 2
- Timer- Based Overload Protection with Latched (option A) or
Auto- Recovery (option B) Operation
- High- voltage Current Source with Dynamic Self- Supply,
Simplifying the Design of the VCC Capacitor
- Frequency Modulation for Softened EMI Signature, including during
Frequency Foldback mode
- Adjustable Overpower pensation
CS 3 GND 4
6 VCC 5 DRV
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 32 of this data sheet.
- Latch- off Input for Severe Fault Conditions, Allowing Direct
Connection of an NTC for Overtemperature Protection (OTP)
- VCC Operation up to 28 V, with Overvoltage...
