MAX8729EEI+T Maxim Integrated Products, MAX8729EEI+T Datasheet - Page 20

• Manufacturer Part Number: MAX8729EEI+T
• Description: Display Drivers Constant-Frequency H alf-Bridge CCFL Inve
• Manufacturer: Maxim Integrated Products

Specifications of MAX8729EEI+T

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Constant-Frequency, Half-Bridge CCFL
Inverter Controller
Table 2. Operation Summary
20
PIN NAME
HSYNC
LSYNC
DPWM
HFCK
PSCK
CNTL
LFCK
SEL
HF
______________________________________________________________________________________
LF
An analog voltage on CNTL
sets the brightness.
Connect SEL to GND.
Connect a resistor to GND to
set the switching frequency.
Connect a resistor to GND to
set DPWM frequency.
Connect to the HFCK pin of
its slave controller.
Connect to the LFCK pin of
its slave controller.
Not used. Connect to GND.
Not used. Connect to GND.
Connect to the HF pin of its
slave controller.
Connect to the LF pin of its
slave controller.
INTERNAL OSCILLATORS
MASTER MODE USING
An analog voltage on CNTL
sets the brightness.
Connect SEL to GND.
Switching frequency is
controlled by the external
sync signal. Connect a
resistor to GND in case the
external sync signal is lost.
DPWM frequency is
determined by the external
sync signal. Connect a
resistor to GND in case the
external sync signal is lost.
Connect to the HFCK pin of its
slave controller.
Connect to the LFCK pin of its
slave controller.
Connect to a high-frequency
external signal to sync the
switching frequency.
Connect a low-frequency
external signal to sync the
digital PWM frequency.
Connect to the HF pin of its
slave controller.
Connect to the LF pin of its
slave controller.
EXTERNAL SYNC SIGNAL
MASTER MODE USING
(SYNC ONLY)
CNTL control is disabled.
The external signal controls
the brightness. Connect
CNTL to an analog voltage
in case the external sync
signal is lost.
Connect SEL to V
Switching frequency is
controlled by the external
sync signal. Connect a
resistor to GND in case the
external sync signal is lost.
DPWM frequency is
determined by the external
sync signal. Connect a
resistor to GND in case the
external sync signal is lost.
Connect to the HFCK pin of
its slave controller.
Connect to the LFCK pin of
its slave controller.
Connect to a high-
frequency external signal to
sync the switching
frequency.
Connect a low-frequency
external signal to sync the
digital PWM frequency. The
duty cycle of the external
signal determines the
brightness.
Connect to the HF pin of its
slave controller.
Connect to the LF pin of its
slave controller.
EXTERNAL SYNC SIGNAL
MASTER MODE USING
(SYNC AND DIMMING)
CC
.
Connect CNTL to V
Brightness is controlled
by the master.
Don’t care.
Connect to the PSCK
pin of its master
controller.
Connect to the DPWM
pin of its master
controller.
Connect to the HFCK
pin of its master
controller. Connect a
1MΩ resistor to GND.
Connect to the LFCK
pin of its master
controller. Connect a
1MΩ resistor to GND.
Not used.
Connect to GND.
Not used.
Connect to GND.
Connect to the HF pin
of its slave controller.
Connect to the LF pin of
its slave controller.
SLAVE MODE
CC
.