ISL8843MBZ datasheet(5/12 Pages) INTERSIL

Part #	ISL8843MBZ

Description	Industry Standard Single-Ended Current Mode PWM Controller

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Manufacturer	INTERSIL [Intersil Corporation]

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5 / 12 page

5

FN9238.0

October 19, 2005

FB Input Bias Current

VFB = 0V

-1.0

-0.2

1.0

µA

COMP Sink Current

VCOMP = 1.5V, VFB = 2.7V

1.0

-

mA

COMP Source Current

VCOMP = 1.5V, VFB = 2.3V

-0.4

-

mA

COMP VOH

VFB = 2.3V

4.80

-

VREF

V

COMP VOL

VFB = 2.7V

0.4

-

1.0

V

PSRR

Frequency = 120Hz, VDD = 12V to

18V (Note 5)

60

80

-

dB

OSCILLATOR

Frequency Accuracy

Initial, TA = 25°C

485153

kHz

Frequency Variation with VDD

TA= 25°C, (F30V - F9V)/F30V

-0.2

1.0

%

Temperature Stability

(Note 5)

-

5

%

Amplitude, Peak to Peak

Static Test

-

1.75

-

V

RTCT Discharge Voltage (Valley Voltage)

Static Test

-

1.0

-

V

Discharge Current

RTCT = 2.0V

6.5

7.8

8.5

mA

OUTPUT

Gate VOH

VDD - OUT, IOUT = -200mA

-

1.0

2.0

V

Gate VOL

OUT - GND, IOUT = 200mA

-

1.0

2.0

V

Peak Output Current

COUT = 1nF (Note 5)

-

1.0

-

A

Rise Time

COUT = 1nF (Note 5)

-

20

40

ns

Fall Time

COUT = 1nF (Note 5)

-

20

40

ns

GATE VOL UVLO Clamp Voltage

VDD = 5V, ILOAD = 1mA

-

1.2

V

PWM

Maximum Duty Cycle

COMP = VREF

93.5

95

-

%

Minimum Duty Cycle

COMP = GND

-

0

%

NOTES:

3. Specifications at -40°C and 105°C are guaranteed by 25°C test with margin limits.

4. This is the VDD current consumed when the device is active but not switching. Does not include gate drive current.

5. Guaranteed by design, not 100% tested in production.

Electrical Specifications

ISL8843M - Recommended operating conditions unless otherwise noted. Refer to Block Diagram and

Typical Application schematic. VDD = 15V, RT = 10kΩ, CT = 3.3nF, TA = -55 to 125°C (Note 6), Typical values

are at TA = 25°C

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

UNDERVOLTAGE LOCKOUT

START Threshold

8.0

8.4

9.0

V

STOP Threshold

7.3

7.6

8.0

V

Hysteresis

-0.8

-

V

Startup Current, IDD

VDD < START Threshold

-

90

125

µA

Operating Current, IDD

(Note 7)

-

2.9

4.0

mA

Operating Supply Current, ID

Includes 1nF GATE loading

-

4.75

5.5

mA

REFERENCE VOLTAGE

Overall Accuracy

Over line (VDD = 12V to 18V), load,

temperature

4.900

5.000

5.050

V

Electrical Specifications

ISL8843A - Recommended operating conditions unless otherwise noted. Refer to Block Diagram and

Typical Application schematic. VDD = 15V, RT = 10kΩ, CT = 3.3nF, TA = -40 to 105°C (Note 3) Typical values

are at TA = 25°C (Continued)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

ISL8843

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