LX1692

Microsemi

Integrated Products Division

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 2

Copyright

© 2004

Rev. 1.2, 12/20/2006

Full Bridge Resonant CCFL Controller

TM

®

ABSOLU T E MAX I M U M RATINGS

Supply Input Voltage(VDDP)............................................................................................. 6.6V

VIN_SNS

.........................................................-0.3V to (VDDP+0.5V), not to exceed +6.6V

Digital Input (ENABLE) ................................... -0.3V to (VDDP+0.5V) , not to exceed +6.6V

Analog Inputs (ISNS, OV_SNS, OC_SNS)clamped to ±14V Max Peak Current ±100mA

Analog Inputs (BRITE_A, BRITE_D) ............. -0.3V to (VDDP +0.5V) , not to exceed +6.6V

Analog Outputs (I_R, ICOMP, VCOMP)........ -0.3V to (VDDP + 0.5V) , not to exceed +6.6V

Maximum Operating Junction Temperature .....................................................................150°C

Storage Temperature Range....................................................................................-65 to 150°C

Peak Package Solder Reflow Temp.(40 seconds max. exposure) .........................260°C(+0, -5)

Note: Exceeding these ratings could cause damage to the device. All voltages are with respect

to

Ground. Currents are positive into, negative out of specified terminal

.

THER MAL DATA

THERMAL RESISTANCE

θ

JA

85

°C/W

THERMAL RESISTANCE

θ

JA

99

°C/W

The

θ

above assume no ambient airflow.

PACKAG E PIN OU T

C_R

I_R

C_BST

C_TO

VDDA

ENABLE

BRITE_D

ICOMP

VIN_SNS

OC_SNS

OV_SNS

ISNS

DOUT

COUT

BOUT

AOUT

1

10

11

20

VCOMP

BRITE_A

GND

VDDP

(Top View)

1

10

11

20

9

8

7

6

5

4

3

2

12

13

14

15

16

17

18

19

C_R

I_R

C_BST

C_TO

VDDA

ENABLE

BRITE_D

ICOMP

VCOMP

BRITE_A

VIN_SNS

OC_SNS

OV_SNS

ISNS

DOUT

COUT

BOUT

AOUT

GND

VDDP

(Top View)

RoHS / Pb-free 100% Matte Tin Lead Finish

FUNCTIO N AL PIN DESCRIPTION

Name

Description

C_R

Lamp Frequency Programming Capacitor Pin – lamp running frequency is set by the combination of C_R and

I_R. The internal lamp current oscillator frequency can be forced to follow an external clock signal at this pin. In

this case, the programmed frequency must be lower than the external frequency. Minimum pulse width for

external synch signal is 1µsec. Maximum duty is 50%

I_R

Current Reference Resistor Input. Connects to an external resistor that determines the magnitude of internal

bias currents. The I_R pin is a DC reference voltage of 1V. This voltage cannot be used for other than its

intended function. The reference current established at this pin by connecting an external resistor is used to

charge a capacitor at the C_R pin. The nominal lamp frequency can be adjusted by varying this resistor value in

the range of 20K to 100K Ohms. (Note: C is in pF, R is in

Ω

K

, Freq is in KHz).

R

_

I

R

_

C

3

LAMP

R

C

10

242

F

⋅

×

=

Other reference currents derived from I_R are used for the digital dimming burst oscillator and the strike time

out function.