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What is MP1038?

This electronic component, produced by the manufacturer "MPS", performs the same function as "Full Bridge CCFL Controller".


MP1038 Datasheet PDF - MPS

Part Number MP1038
Description Full Bridge CCFL Controller
Manufacturers MPS 
Logo MPS Logo 


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Monolithic Power Systems
MP1038
Full Bridge
CCFL Controller
PRELIMINARY RELEASE – MPS CONFIDENTIAL
DESCRIPTION
The MP1038 is a fixed operating frequency
inverter controller that controls four external
N-Channel power MOSFETs in a full-bridge
configuration. The inverter is designed to power
one or more cold cathode fluorescent lamps
(CCFL) to backlight liquid crystal displays. Its
full-bridge architecture converts unregulated DC
input voltages to the nearly pure sine waves
required to ignite and operate CCFL.
For reliable lamp ignition, the operating frequency
is set by an external resistor and during startup, is
temporarily swept toward the unloaded resonant
frequency of the tank. The built-in burst oscillator
can be synchronized with an external clock to
minimize display scan interference. Burst mode or
analog mode dimming is controlled with an
external analog signal. Built-in fault management
features include an open lamp regulator, a
transformer secondary peak current regulator,
and a dual-mode fault timer. The secondary
over-current timeout can be shortened with
external components. Built-in current limits for the
external switches protect against inadvertent
shorts. The MP1038 is available in TSSOP28 and
SOIC28 packages.
FEATURES
Controls Four External, Low Cost, N-Channel
MOSFETs
Fixed Operating Frequency
Input Voltage Range of 10V to 32V
Lamp Current and Voltage Regulation
Full-Wave Sense Amp
Analog and Burst Mode Dimming Control
Integrated Burst Mode Oscillator and Modulator
Soft On and Soft Off Burst Envelope
Open Lamp Protection
Secondary Over-Current Protection
Dual-mode, Fault Timer
Thermal Shutdown with Hysteresis
Available in TSSOP28 and SOIC28 Packages
APPLICATIONS
Desktop LCD Flat Panel Displays
Flat Panel Video Displays
LCD TVs and Monitors
, “MPS”, “Monolithic Power Systems”, and “The Future of Analog IC
Technology” are Registered Trademarks of Monolithic Power Systems, Inc.
The MP1038 is covered by US Patents 6,683,422, 6,316,881, and 6,114,814.
Other Patents Pending.
TYPICAL APPLICATION
DBRT
ABRT
ENSYNC
LOK
07/04, Rev. 1.2
1 SI
PGL 28
2 LI
LGL 27
3 LV
VCCL 26
4 COMP
OUTL 25
5 AG
UGL 24
6 FT
BTL 23
7 LCS
PRL 22
8 LCC
PGR 21
9 BRC
LGR 20
10 BRS
VCCR 19
11 DBRT
OUTR 18
12 ABRT
UGR 17
13 ENSYNC BTR 16
14 LOK
PRR 15
www.MonolithicPower.com
GND
VPS
MP1038_TA01
1

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MP1038 equivalent
MP1038 – FULL BRIDGE CCFL CONTROLLER
PRELIMINARY RELEASE – MPS CONFIDENTIAL
PIN FUNCTIONS (continued)
For TSSOP28 and SOIC28 devices
Pin #
16
17
18
19
20
21
22
23
24
25
26
27
28
Name
BTR
UGR
OUTR
VCCR
LGR
PGR
PRL
BTL
UGL
OUTL
VCCL
LGL
PGL
Description
Output Bootstrap, Right-Side. BTR provides gate bias for the right-side high-side MOSFET.
Connect a capacitor from BTR to OUTR.
High-Side MOSFET Gate Output, Right-Side. Connect UGR to the gate of the high-side,
right-side, external power MOSFET.
Bridge Output, Right-Side. Connect OUTR to the source of the right-side, high-side
MOSFET and the drain of the low-side, right-side MOSFET.
Voltage Rail Output, Right-Side. VCCR allows bypassing the bias supply for the control
circuitry. Bypass VCCR with a 0.47uF capacitor. Connect to VCCL.
Low-Side MOSFET Gate Output, Right-Side. Connect LGR to the gate of the low-side,
right-side MOSFET.
Power Ground, Right-Side. Connect PGR to the source of the low-side, right-side MOSFET.
Input Power Rail, Left-Side. Connect PRL directly to the drain of the high-side, left-side,
external power MOSFET.
Output Bootstrap, Left-Side. BTL provides gate bias for the left-side high-side MOSFET.
Connect a capacitor from BTL to OUTL.
High-Side MOSFET Gate Output, Left-Side. Connect UGL to the gate of the high-side,
left-side, external power MOSFET.
Bridge Output, Left-Side. Connect OUTL to the source of the left-side, high-side MOSFET
and the drain of the left-side, low-side MOSFET.
Voltage Rail Output, Left-Side. VCCL allows bypassing the bias supply for the control
circuitry. Bypass VCCL with a 0.47uF capacitor. Connect to VCCR.
Low-Side MOSFET Gate Output, Left-Side. Connect LGL to the gate of the low-side,
left-side MOSFET.
Power Ground, Left-Side. Connect PGL to the source of the low-side, left-side MOSFET.
07/04, Rev. 1.2
www.MonolithicPower.com
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