3

AT9933

Symbol

Description

Min

Typ

Max

Units

Conditions

Reference

V

REF

REF pin voltage

-40°C < T

-

1.212

1.25

1.288

V

REF bypassed with a 0.1µF

capacitor to GND, I

PWMD = 5.0V

REF pin voltage

-40°C < T

-

1.187

1.25

1.312

V

REFLINE

Line regulation of reference

voltage

-0

-

20

mV

REF bypassed with a 0.1µF

capacitor to GND, I

V

I

REF

Reference output current range

-

-0.01

500

µA

REF bypassed with a 0.1µF

capacitor to GND, I

V

V

REFLOAD

Load regulation of reference

voltage

-0

-

10

mV

REF bypassed with a 0.1µF

capacitor to GND, I

PWMD = 5.0V

PWM Dimming

PWMD input low voltage

*

-

-

0.8

V

V

V

PWMD(hi)

PWMD input high voltage

*

2.0

-

-

V

V

R

PWMD

PWMD pull-down resistance

-

50

100

150

kΩ

V

I

PWMD

Maximum current into PWMD pin

-

-

-

5

mA

---

GATE

I

SOURCE

GATE short circuit current

-

0.165

-

-

AV

I

SINK

GATE sinking current

-

0.165

-

-

A

V

T

RISE

GATE output rise time

-

-

30

50

ns

C

T

FALL

GATE output fall time

-

-

30

50

ns

C

Input Current Sense Comparator

V

TURNON1

Voltage required to turn GATE on

*

85

100

115

mV

CS2 = 200mV; CS1 increasing;

GATE goes LOW to HIGH

V

TURNOFF1

Voltage required to turn GATE off

*

-15

0

15

mV

CS2 = 200mV; CS1 decreasing;

GATE goes HIGH to LOW

T

D1,ON

Delay to output (turn on)

-

-

150

250

ns

CS2 = 200mV;

CS1 = 50mV to +200mV step

T

D1,OFF

Delay to output (turn off)

-

-

150

250

ns

CS2 = 200mV;

CS1 = 50mV to -100mV step

Output Current Sense Comparator

V

TURNON2

Voltage required to turn GATE on

*

85

100

115

mV

CS1 = 200mV; CS2 increasing;

GATE goes LOW to HIGH

V

TURNOFF2

Voltage required to turn GATE off

*

-15

0

15

mV

CS1 = 200mV; CS2 decreasing;

GATE goes HIGH to LOW

T

D2,ON

Delay to output (turn on)

-

-

150

250

ns

CS1 = 200mV;

CS2 = 50mV to +200mV step

T

D2,OFF

Delay to output (turn off)

-

-

150

250

ns

CS1 = 200mV;

CS2 = 50mV to -100mV step

1 Also limited by package power dissipation limit, whichever is lower.

2 Depends on the current drawn by the part - see application section.