Rainbow-electronics MAX16831 Bedienungsanleitung PDF herunterladen (Seite 3)

MAX16831

High-Voltage, High-Power LED Driver with

Analog and PWM Dimming Control

_______________________________________________________________________________________ 3

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

8.7V ≤ (V

- V

) ≤ 36V, I

CLMP

= 1mA 5.5 8.0 10.0

CLMP Regulator Output Voltage V

CLMP

5.0V ≤ (V

- V

) ≤ 8.7V, I

CLMP

= 250µA

- V

)

- 0.7

CURRENT-SENSE AMPLIFIER (CSA)

Differential Input Voltage Range

CS+

CS-

0 0.3 V

Common-Mode Range 0V

CS+ Input Bias Current I

CS+

- V

CS-

= 0.3V -250 +250 µA

CS- Input Bias Current I

CS-

CS+

- V

CS-

= 0.3V 400 µA

Unity-Gain Bandwidth From (CS+ - CS-) to CS 1.0 MHz

REF OUTPUT BUFFER

REF Output Voltage V

REF

-100µA ≤ I

REF

≤ +100µA 2.85 3.00 3.15 V

DIM DRIVER

CLMP

- V

= 4V 5 20

Source Current

CLMP

- V

= 8V 30 67

CLMP

- V

= 4V 10 22

Sink Current

CLMP

- V

= 8V 40 76

GATE DRIVER

DRI UVLO Threshold V

UVLO_TH

DRI rising 4.0 4.2 4.4 V

DRI UVLO Threshold Hysteresis V

UVLO_HYST

0.3 V

OUT_L

DRI

= 7.0V, DRV sinking 250mA 2.8 4

Driver Output Impedance

OUT_H

DRI

= 7.0V, DRV sourcing 250mA 5.0 8

Ω

Peak Sink Current I

DRI

= 7.0V 2.5 A

Peak Source Current I

DRI

= 7.0V 1.4 A

PWM, ILIM, AND HICCUP COMPARATOR

PWM Comparator Offset Voltage V

COMP

- (V

SNS+

- V

SNS-)

0.7 V

Peak Current-Limit Comparator

Trip Threshold

160 200 240 mV

Peak Current-Limit Comparator

Propagation Delay (Excluding

Blanking Time)

50mV overdrive 40 ns

HICCUP Comparator Trip

Threshold

235 300 385 mV

SNS+ Input Bias Current V

SNS+

= 0V, V

SNS-

= 0V -100 -65 µA

SNS- Input Bias Current V

SNS+

= 0V, V

SNS-

= 0V -100 -65 µA

Blanking Time t

BLNK

40 ns

ELECTRICAL CHARACTERISTICS (continued)

= V

UVEN

= 14V, C

REG1

= 1µF, C

REG2

= 1µF, C

CLMP

= 0.1µF, R

= 25kΩ, T

= T

= -40°C to +125°C, unless otherwise noted.

Typical specifications are at T

= +25°C.)

1 2 3 4 5 6 7 8 ... 19 20

MAX16831 1

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