NCP1205(2002) Просмотр технического описания (PDF) - ON Semiconductor

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Компоненты Описание

производитель

NCP1205
(Rev.:2002)

Single Ended PWM Controller Featuring QR Operation and Soft Frequency Foldback

ON Semiconductor 

NCP1205

MAXIMUM RATINGS

Rating

Power Supply Voltage

Thermal Resistance Junction–to–Air

DIP8

DIP14

Operating Junction Temperature Range

Maximum Junction Temperature

Storage Temperature Range

ESD Capability, HBM Model

ESD Capability, Machine Model

Demagnetization Pin Current

Pin No.

DIP8

DIP14

8

13

–

–

–

–

–

–

–

All Pins

All Pins

3

–

–

–

All Pins

All Pins

3

Symbol

Vin

RqJA

TJ

TJmax

Tstg

–

–

–

Value

Min

Max

–

45

–

100

–

100

–

–25 to +125

–

150

–

–60 to +150

–

2.0

–

200

–

"5.0

Unit

V

°C/W

°C

°C

°C

kV

V

mA

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

VCC = 12 V unless otherwise noted.)

Pin No.

Characteristics

DIP8 DIP14 Symbol

Min

Typ

Max Unit

Demagnetization Block

Input Threshold Voltage (Vpin2 increasing)

Hysteresis (Vpin2 decreasing)

Input Clamp Voltage

High State (Ipin2 = 3.0 mA)

Low State (Ipin2 = –3.0 mA)

Demag Propagation Delay

No Demag Signal Activation

Internal Input Capacitance at 1.0 V

Demag Propagation Delay with 22 kΩ External Resistor

2

3

Vth

50

65

85

mV

2

3

VH

–

30

–

mV

2

3

V

VCH

8.0

10

12

VCL

–0.9

–0.7

–0.5

–

–

–

100

300

350

ns

–

–

–

–

4.0

8.0

µs

2

3

Cpin2

–

10

–

pF

2

3

–

100

370

480

ns

Feedback Path

Input Impedance at VFB = 3.0 V

Internal Error Amplifier Closed Loop Gain

Internal Built–In Offset Voltage for Error Detection

Error Amplifier Level of VCO Take Over

Internal Divider from Internal Error Amp, Pin to Current

Setpoint

3

4

Zin

–

50

–

kΩ

3

4

AVCL

–

–3.0

–

–

–

–

Vref

2.2

2.5

2.8

V

–

–

–

–

1.0

–

V

–

–

–

–

3.0

–

–

Fault Detection Circuitry

Internal Over Current Level

Fault Time Duration to Latch Activation @ Ct = 1.0 ηF

Over Current Latch–Off Phase @ Ct = 1.0 ηF

Hysteresis when VFB goes back into Regulation

VCC (Pin 8) Over Voltage Protection

Over Voltage Protection Threshold for DIP14 Version

–

–

WLL

–

1.5

–

V

–

–

–

–

128

–

ms

–

–

–

–

1.0

–

s

–

–

–

–

100

–

mV

8

13

OVP1

36

40

43

V

6

6

OVP2

2.5

2.8

3.1

V

Current Sense Comparator

Input Bias Current @ 1.0 V

Maximum Current Setpoint

Minimum Current Setpoint

6

11

IIB

–

0.02

–

µA

6

11

Vcl

0.9

1.0

1.1

V

6

11

Vmin

225

250

285

mV

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