IR21571 Просмотр технического описания (PDF) - International Rectifier

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производитель

IR21571

FULLY INTEGRATED BALLAST CONTROL IC

International Rectifier 

IR21571(S)

Recommended Operating Conditions

For proper operation the device should be used within the recommended conditions.

Symbol

VBS

VS

VCC

ICC

VDC

CT

RDT

ROC

IRT

IRPH

IRUN

ISD

ICS

TJ

Definition

High side floating supply voltage

Steady state high side floating supply offset voltage

Supply voltage

Supply current

VDC lead voltage

CT lead capacitance

Deadtime resistance

Over-current (CS+) threshold programming resistance

RT lead current (Note 3)

RPH lead current (Note 3)

RUN lead current (Note 3)

Shutdown lead current

Current sense lead current

Junction temperature

Min.

VCC - 0.7

-3.0

VCCUV+

Note 2

0

220

1.0

—

-500

0

0

-1

-1

-40

Max.

VCLAMP

600

VCLAMP

10

VCC

—

—

50

-50

450

450

1

1

125

Units

V

mA

V

pF

kΩ

uA

mA

oC

Electrical Characteristics

VCC = VBS = VBIAS = 14V +/- 0.25V, RT = 40.0kΩ, CT = 470 pF, RPH and RUN leads no connection, VCPH = 0.0V,

RDT = 6.1kΩ, ROC = 20.0kΩ, VCS = 0.5V, VSD = 0.0V, CL = 1000pF, TA = 25oC unless otherwise specified.

Supply Characteristics

Symbol Definition

VCCUV+

VUVHYS

IQCCUV

IQCCFLT

VCC supply undervoltage positive going

threshold

VCC supply undervoltage lockout hysteresis

UVLO mode quiescent current

Fault-mode quiescent current

IQCC Quiescent VCC supply current

IQCC50K VCC supply current, f= 50kHz

VCLAMP VCC zener clamp voltage

Min.

10.5

1.5

50

75

2.9

4.0

14.5

Typ.

11.4

1.8

150

200

3.8

5.5

15.6

Max.

12.4

2.2

300

300

4.3

7.0

16.5

Units

µA

mA

V

Test Conditions

VCC rising from 0V

VCC < VCCUV-

SD=5V, CS = 2V or

Tj > TSD

RT no connection, CT

connected to COM

RT =36kΩ, RDT =

5.6kΩ, CT=220pF

ICC = 10mA

Note 2:

Note 3:

Enough current should be supplied into the VCC lead to keep the internal 15.6V zener clamp diode on this

lead regulating its voltage.

Due to the fact that the RT input is a voltage-controlled current source, the total RT lead current is the sum of

all the parallel current sources connected to that lead. For optimum oscillator current mirror performance, this

total current should be kept between 50µA and 500µA. During the preheat mode, the total current flowing out

of the RT lead consists of the RPH lead current plus the current due to the RT resistor. During the run mode,

the total RT lead current consists of the RUN lead current plus the current due to the RT resistor.

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