NCP1207A datasheet(4/17 Pages) ONSEMI

Part #	NCP1207A

Description	PWM Current-Mode Controller for Free Running Quasi-Resonant Operation

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP1207A, NCP1207B

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ELECTRICAL CHARACTERISTICS (For typical values TJ = 25°C, for min/max values TJ = 0°C to +125°C, Max TJ = 150°C,

VCC = 11 V unless otherwise noted)

Rating

Symbol

Min

Typ

Max

Unit

DYNAMIC SELF-SUPPLY

VCC Increasing Level at which the Current Source Turns-off

6

VCCOFF

10.8

12

12.9

V

VCC Decreasing Level at which the Current Source Turns-on

6

VCCON

9.1

10

10.6

V

VCC Decreasing Level at which the Latchoff Phase Ends

6

VCClatch

-

5.3

-

V

VCC Level at which Output Pulses are Disabled

6

UVLO

-

VCCON

-200mV

-

V

Internal IC Consumption, No Output Load on Pin 5,

FSW = 60 kHz

6

ICC1

-

1.0

1.3

(Note 1)

mA

Internal IC Consumption, 1.0 nF Output Load on Pin 5,

FSW = 60 kHz

6

ICC2

-

1.6

2.0

(Note 1)

mA

Internal IC Consumption in Latchoff Phase

6

ICC3

-

330

-

mA

INTERNAL STARTUP CURRENT SOURCE (TJ u 0°C)

High-voltage Current Source, VCC = 10 V

8

IC1

4.3

7.0

9.6

mA

High-voltage Current Source, VCC = 0

8

IC2

-

8.0

-

mA

DRIVE OUTPUT

Output Voltage Rise-time @ CL = 1.0 nF, 10-90% of Output Signal

5

Tr

-

40

-

ns

Output Voltage Fall-time @ CL = 1.0 nF, 10-90% of Output Signal

5

Tf

-

20

-

ns

Source Resistance

5

ROH

12

20

36

W

Sink Resistance

5

ROL

5.0

10

19

W

CURRENT COMPARATOR (Pin 5 Unloaded)

Input Bias Current @ 1.0 V Input Level on Pin 3

3

IIB

-

0.02

-

mA

Maximum Internal Current Setpoint

3

ILimit

0.92

1.0

1.12

V

Propagation Delay from Current Detection to Gate OFF State

3

TDEL

-

100

160

ns

Leading Edge Blanking Duration

3

TLEB

-

380

-

ns

Internal Current Offset Injected on the CS Pin during OFF Time

3

Iskip

-

200

-

mA

OVERVOLTAGE SECTION (VCC = 11 V)

Sampling Delay after ON Time

NCP1207A

NCP1207B

1

Tsample

-

4.5

1.5

-

ms

OVP Internal Reference Level

1

Vref

6.4

7.2

8.0

V

FEEDBACK SECTION (VCC = 11 V, Pin 5 Loaded by 1.0 kW)

Internal Pull-up Resistor

2

Rup

-

20

-

k

W

Pin 3 to Current Setpoint Division Ratio

-

Iratio

-

3.3

-

Internal Soft-start

-

Tss

-

1.0

-

ms

DEMAGNETIZATION DETECTION BLOCK

Input Threshold Voltage (Vpin 1 Decreasing)

1

Vth

35

50

90

mV

Hysteresis (Vpin 1 Decreasing)

1

VH

-

20

-

mV

Input Clamp Voltage

High State (Ipin 1 = 3.0 mA)

Low State (Ipin 1 = -2.0 mA)

1

VCH

VCL

8.0

-0.9

10

-0.7

12

-0.5

V

Demag Propagation Delay

1

Tdem

-

210

-

ns

Internal Input Capacitance at Vpin 1 = 1.0 V

1

Cpar

-

10

-

pF

Minimum TOFF (Internal Blanking Delay after TON)

NCP1207A

NCP1207B

1

Tblank

-

3.5

8.0

4.5

-

5.5

ms

Timeout After Last Demag Transition

1

Tout

-

5.0

-

ms

Pin 1 Internal Impedance

1

Rint

-

28

-

k

W

1. Max value at TJ = 0°C.

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