17000-00TU 查看數據表（PDF） - IXYS CORPORATION

零件编号

产品描述 (功能)

生产厂家

17000-00TU

White LED Step-Up Converter

IXYS CORPORATION 

MX841

IXYS

AC Electrical Characteristics

VDD=3.0V, RSENSE=5Ω; VCTRL=1.0V, L=6.8µH; CBYP=1µF, TA = -40oC to +85oC, Typical Values at +25oC

Unless otherwise specified

Parameter

Condition

Min Typ Max

Oscillator Frequency

0.6

1.0

1.3

Duty Cycle

72.5

Unit

MHz

%

Pin Description

Pin No. Pin Name

1, 4 SW

2

Analog GND

3

Switch GND

5

VDD

6

OVD

7

CTRL

8

Isense

Description

Power Switch. Connects the drain of the internal high voltage N-channel

MOSFET to the Inductor and Schottky Diode to generate the LED boost

voltage. This voltage is determined by the total forward bias voltage of the

LED series string and the Isense resistor value. (Note: Both pins must be

connected.)

Analog Ground (Note: Must be connected to a low noise ground source.)

Switch Ground (Note: Must be connected to a high current ground source.)

Input supply pin. Input range from 1.1 to 5.5 volts. Must be bypassed with a

low ESR capacitor to GND.

Over Voltage Detect input. Compares the LED boots voltage to the internal

voltage reference. If the boost voltage rises above 22V the OVD circuit

disables the oscillator and N-channel MOSFET until the boost voltage falls

below 18.5V. Must be bypassed with a low ESR capacitor to GND.

Shutdown and Intensity Control Input. A control voltage above 260mV

enables device operation. A control voltage below 100mV disables device

operation. LED intensity is linearly adjusted with voltages between 260mV

and VDD.

Current Sense Input. The LED bias current is set by connecting a carbon

composite or monolithic resistor from this input to Ground. ISENSE regulates

this current to 1/13 of the CTRL input voltage.

MX841

Drawing No. 17023

3

Preliminary

03/10/05

www.ixys.net

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