VIPER20 データシートの表示（PDF） - STMicroelectronics

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VIPER20

SMPS PRIMARY I.C

STMicroelectronics 

VIPer20/SP/DIP - VIPer20A/ASP/ADIP

ELECTRICAL CHARACTERISTICS (continued)

OSCILLATOR SECTION

Symbol

Parameter

Test Conditions

Min

Rt=8.2KΩ; Ct=2.4nF

90

FSW

Oscillator Frequency

Total Variation

VDD=9 to 15V;

with Rt± 1%; Ct± 5%

(see fig. 6 and fig. 9)

VOSCih

VOSCil

Oscillator Peak Voltage

Oscillator Valley Voltage

ERROR AMPLIFIER SECTION

Symbol

VDDreg

∆VDDreg

GBW

AVOL

Gm

VCOMPLO

VCOMPHI

ICOMPLO

ICOMPHI

Parameter

VDD Regulation Point

Total Variation

Unity Gain Bandwidth

Open Loop Voltage Gain

DC Transconductance

Output Low Level

Output High Level

Output Low Current

Capability

Output High Current

Capability

Test Conditions

ICOMP=0mA

(see fig. 1)

Tj=0 to 100°C

From Input =VDD to Output = VCOMP

COMP pin is open

(see fig. 10)

COMP pin is open

(see fig. 10)

VCOMP=2.5V

ICOMP= -400µA; VDD=14V

ICOMP=400µA; VDD=12V

(see fig. 1)

VCOMP=2.5V; VDD=14V

VCOMP=2.5V; VDD=12V

Min

12.6

45

1.1

PWM COMPARATOR SECTION

Symbol

Parameter

Test Conditions

Min

HID

∆VCOMP / ∆IDPEAK

VCOMP=1 to 3 V

4.2

VCOMPoff VCOMP Offset

IDPEAK=10mA

IDpeak Peak Current Limitation VDD=12V; COMP pin open

0.5

td

Current Sense Delay to

Turn-Off

ID=1A

tb

ton(min)

Blanking Time

Minimum On Time

SHUTDOWN AND OVERTEMPERATURE SECTION

Symbol

Parameter

Test Conditions

Min

VCOMPth Restart Threshold

(see fig. 4)

tDISsu Disable Set Up Time

(see fig. 4)

Ttsd

Thermal Shutdown

Temperature

(See fig. 8)

140

Thyst

Thermal Shutdown

Hysteresis

(See fig. 8)

Typ

100

7.1

3.7

Typ

13

2

150

52

1.5

0.2

4.5

-600

600

Typ

6

0.5

0.67

250

250

350

Typ

0.5

1.7

170

40

Max Unit

110 kHz

V

V

Max Unit

13.4

V

%

kHz

dB

1.9 mA/V

V

V

µA

µA

Max Unit

7.8 V/A

V

0.9

A

ns

360

ns

ns

Max Unit

V

5

µs

190

°C

°C

5/25

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