NCP1212P ON Semiconductor, NCP1212P Datasheet - Page 4

• Manufacturer Part Number: NCP1212P
• Description: IC CTRLR PWM PROG CM OVP 8DIP
• Manufacturer: ON Semiconductor
• Type: PWM Controller for Both Forward and Flyback Convertersr

Specifications of NCP1212P

• Output Isolation: Isolated
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Input Voltage Range: - 0.3 V to + 28 V
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: NCP1212POS

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:
2. Latchup Current Maximum Rating: 150 mA per JEDEC standard: JESD78.
PIN FUNCTION DESCRIPTION
MAXIMUM RATINGS
Pin
Power Supply Voltage (Pin 7)
Input/Output Pins (Pins 1, 2, 3, 4, 8)
Gate Driver Output Pin (Pin 6)
Power Dissipation and Thermal Characteristics
Output Current, Source or Sink
Operating Junction Temperature Range
Operating Ambient Temperature Range
Storage Temperature Range
ESD Capability, HBM (All pins except V
ESD Capability, Machine Model (All pins except V
1
2
3
4
5
6
7
8
Human Body Model (HBM) ≤2.0 kV per JEDEC standard: JESD22--A114.
Machine Model (MM) ≤200 V per JEDEC standard: JESD22--A115.
Thermal Resistance, Junction--to--Air, PDIP--8 Version
Thermal Resistance, Junction--to--Air, SOIC--8 Version
SS/DMAX
Name
BOK
GND
DRV
VCC
CS
FB
CT
Programmed Oscillator
Maximum Duty Cycle
Positive Supply to IC
Current Sense Input
Gate Driver Output
Programming and
Brownout Detect
Feedback Input
Soft--Start Time
with Hysteresis
(T
Frequency
J
IC Ground
Function
Selection
= 25C unless otherwise noted.)
CC
Rating
pin) (Note 1)
This pin detects voltage feedback from output, can be connected directly to the
optocoupler collector pin.
This is the inverting input of the brownout detect comparator. The brownout detect
comparator has a detect threshold voltage of 1.21 V. This pin senses the voltage of the
bulk capacitor through a resistor divider network to determine the brownout event. The
hysteresis band is provided by a 45 mA current flows out of this pin to the resistor
network.
During output on–time of the power switch, this pin receives a voltage proportional to
power switch current set by the current sensing resistor. The information is utilized to
terminate output switch conduction by PWM action or overcurrent limit circuitry.
Connecting a capacitor from CT pin to ground programs the internal oscillator frequency.
The oscillator can operate up to 200 kHz.
This is a high current totem pole output. The PWM driving control is provided by this pin.
The current and slew rate capability of this pin are suitable to drive a Power MOSFET.
This pin is the positive supply of the IC. The driver output gets disabled when the voltage
becomes higher than 25 V and the operating range is between 10 V and 25 V. The
startup voltage is set at 15 V.
This is a multi--function pin. Soft--start effect is provided during startup with a capacitor
connected to this pin. After soft--start period elapsed, the capacitor is used for timing
control to determine output overload. If only a capacitor is connected to this pin, its final
voltage is ~4.3 V and maximum turn--on duty cycle DMAX is set at 82%. Connect a
resistor in parallel with the capacitor can alter the final voltage of this pin. 48% DMAX is
selected if this pin stays at 2.1 V to 2.8 V after soft--start period.
--
CC
pin) (Note 1)
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4
Description
Symbol
R
V
I
V
T
V
DRV
DRV
θJ--A
T
T
stg
CC
--
--
IO
A
J
--40 to +150
--25 to +105
--55 to +150
--0.3, 6.5
--0.3, 28
--0.3, 14
Value
100
178
200
1.0
2.0
C/W
Unit
C
C
C
kV
V
V
V
A
V