3

AT9917

Sym

Description

Min

Typ

Max

Units Conditions

EN Input

V

EN(LO)

EN input low voltage

*

-

-

0.8

V

---

V

EN(HI)

EN input high voltage

*

2.0

-

-

V

---

R

EN

Pull down resistor at EN

-

-

100

-

kΩ

---

Reference

V

REF

REF pin voltage

*

1.210

1.250

1.290

V

I

V

REF,DIS

REF pin voltage when disabled

-

-

0

-

mV

I

V

REFLOAD

Load regulation of reference voltage -

0

-

2.0

mV

I

GATE

T

RISE

GATE output rise time

-

-

20

35

ns

C

V

T

FALL

GATE output fall time

-

-

20

35

ns

C

V

D

MAX

Maximum duty cycle

*

87

-

93

%

---

PWM Dimming

V

PWMD(lo)

PWMD input low voltage

*

-

-

0.8

V

---

V

PWMD(hi)

PWMD input high voltage

*

2.0

-

-

V

---

R

PWMD

PWMD pull-down resistance

-

-

200

-

kΩ

---

Over Voltage Protection

V

OVP,rising

Over voltage rising trip point

*

1.15

1.25

1.35

V

OVP rising

V

OVP,HYST

Over voltage hysteresis

-

-

0.125

-

V

OVP falling

Current Sense

T

BLANK

Leading edge blanking

*

100

-

250

ns

---

T

DELAY1

Delay to output of comparator

-

-

-

150

ns

COMP = AV

V

V

OFFSET

Comparator offset voltage

#

-10

-

10

mV

---

Internal Transconductance Opamp

G

B

Gainbandwidth product

#

1.0

-

-

MHz

150pF capacitance at COMP

pin

A

V

Open loop DC gain

-

65

-

-

dB

Output OPEN

V

CM

Input common-mode range

#

-0.3

-

3.0

V

---

V

O

Output voltage range

#

0.7

-

AV

DD

-

---

G

M

Transconductance

-

-

950

-

µA/V ---

V

OFFSET

Input offset voltage

*

-9.0

-

9.0

mV

---

O

C. V

0.1μF, C

Notes:

* Specifications apply over the full operating ambient temperature range of -40ºC < T

# Specifications guaranteed by design and not tested in production