TE

CH

tm

T8308

TM Technology, Inc. reserves the right

P. 3

Publication Date: Oct. 2014

to change products or specifications without notice.

Revision:C

ABSOLUTE MAXIMUM RATINGS

Parameter

Symbol

Value

Unit

Voltage on input pin relative to GND

VIN

-0.3 to +40

V

ISENSE pin Voltage

-5 to +0.3

V

EN pin Voltage

-0.3 to +6

V

Operating junction Temperature Rang

T

A

-40 to 125

℃

Maximum Soldering Temperature (at lead, 10sec)

T

LEAD

300

℃

Storage Temperature Rang

T

S

-65 to +150

℃

SOT-89

0.5

Power Dissipation, PD @ TA=25℃

SOP-8

0.8

W

SOT-89

200

Package Thermal Resistance,

JA

θ

SOP-8

178

/W

℃

Electrical Characteristics

(TA=-40 to 85℃ unless otherwise noted. Typical values are at TA=25℃, VDD=24V)

Symbol

Description

Conditions

Min.

Typ.

Max.

Unit

VIN

Input voltage

7

-

30

V

V

IRU

Internal regulator start-up threshold

VIN rising

5.65

V

V

IRD

Internal regulator shutdown

VIN falling

5.55

V

I

Q Off

Quiescent supply current with output off DIM pin grounded

170

uA

I

Q On

Quiescent supply current with output

switching

DIM pin floating

fsw= 250kHz

1.8

5

mA

I

SENSE

Mean current sense threshold voltage

(Defines LED current setting accuracy)

Measured on ISENSE pin with

respect to VIN, VADJ = 1.25V

95

100

105

mV

I

SENTH

Sense threshold hysteresis

±15

%

ISENSE

ISENSE pin input current

VSENSE = VIN -0.1

10

uA

V

IH EN

DIM Input Voltage High

2

V

V

IL EN

DIM Input Voltage Low

0.5

V

I

LXM

Continuous LX switch current

0.8

A

R

LX

LX Switch ‘On’ resistance

@I

0.6

Ω

I

LXI

LX switch leakage current

5

uA

T

TP

Thermal Shutdown Protect

160

℃

f

LX

Operating frequency

DIM pin floating,

L=33uH(0.093ohm)

IOUT=0.8A @VLED=3.6V

Driving 1LED

280

KHz

T

ONmin

Minimum switch ‘ON’ time

LX switch ‘ON’

240

n S