Rainbow-electronics MAX16803 Manual do Utilizador descarregar pdf (Página 3)

MAX16803

High-Voltage, 350mA, High-Brightness LED

Driver with PWM Dimming and 5V Regulator

_______________________________________________________________________________________ 3

Note 1: All devices 100% production tested at T

= +25°C. Limits over the operating temperature range are guaranteed by design.

Note 2: Resistors were added from OUT to CS+ to aid with the power dissipation during testing.

Note 3: Dropout is measured as follows:

Connect R

= 27Ω from OUT to CS+. Connect R

SENSE

= 0.58Ω from CS+ to CS-. Set V

= +12V (record V

OUT

as V

OUT1

Reduce V

until V

OUT

= 0.97 x V

OUT1

(record as V

IN2

and V

OUT2

). ∆V

= V

IN2

- V

OUT2

Note 4: I

= 0mA.

Note 5: t

time includes the delay and the rise time needed for I

OUT

to reach 90% of its final value. t

OFF

time is the time needed

for I

OUT

to drop below 10%. See the Typical Operating Characteristics. t

and t

OFF

are tested with 13Ω from OUT to CST.

Note 6: Current regulation varies with V5 load (see the Typical Operating Characteristics).

Note 7: Thermal shutdown does not function if the output of the 5V reference is shorted to ground.

ELECTRICAL CHARACTERISTICS (continued)

= V

= +12V, C

= 0.1µF to GND, I

= 0, V

CS-

= 0V, V

DIM

= +4V, connect R

SENSE

= 0.58Ω between CS+ and CS- (Note 1).

= -40°C to +125°C, unless otherwise noted. Typical values are at T

= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

THERMAL OVERLOAD

Thermal-Shutdown Temperature

+155

°C

Thermal-Shutdown Hysteresis 23 °C

+5V REGULATOR

Output Voltage Regulation V5 (Note 6) 5.0

5.27

5.5 V

V5 Short-Circuit Current V5 = 0V (Note 7) 16 mA

Typical Operating Characteristics

= V

= +12V, T

= +25°C, unless otherwise noted.)

OUTPUT CURRENT

vs. TEMPERATURE

MAX16803 toc01

TEMPERATURE (°C)

OUTPUT CURRENT (mA)

1109565 80-10 5 20 35 50-25

100

150

200

250

300

350

400

450

-40 125

LOAD

= 350mA

LOAD

= 35mA

LOAD

= 200mA

LOAD

= 100mA

CS+

- V

CS-

) vs. OUTPUT CURRENT

MAX16803 toc02

OUTPUT CURRENT (mA)

CS+

- V

CS-

) (V)

320290230 26080 110 140 170 20050

0.201

0.202

0.203

0.204

0.205

0.206

0.207

0.208

0.209

0.210

0.200

20 350

= 12V

OUTPUT CURRENT

vs. INPUT VOLTAGE

MAX16803 toc03

INPUT VOLTAGE (V)

OUTPUT CURRENT (mA)

35305 10 15 20 25

100

150

200

250

300

350

400

040

1 2 3 4 5 6 7 8 ... 11 12

MAX16803 1
PACKAGE OUTLINE 12

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