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PDF MP4653 Data sheet ( Hoja de datos )

Número de pieza MP4653
Descripción Real LIPS CC - CV Mode LLC TV LED Driver
Fabricantes MPS　
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No Preview Available ! MP4653 Hoja de datos, Descripción, Manual

The Future of Analog IC Technology
DESCRIPTION
The MP465 3 is a CC/CV mode L LC TV LED
driver for LED backligh ting, especially for larg e
size TV LE D backlight ing. Powered by 9V to
30V input supplies, th e MP4653 outputs two
180 degree phase shifted driving signals for the
external power stages. Its enhanced 9V gate
driver provides adequa te driving capability an d
can direct ly drive the external MOSF
ETs
through an external gate driving transformer.
The MP46 53 integrat es a constant current
control loop for the LED current regulation and
also a const ant voltage control loop for the DC
bus voltage, which is used to generate system
power supplies like 12 V/5V with other DC/DC
converters. The CC/CV control loo p programs
the operating frequency of the LLC p ower stage
and thus regulates the LED current and also the
bus voltage.
The MP4653 incorporates both analog dimming
and PWM dimming t o the LED current. A
driving sign al is outpu t to directly drive the
dimming MOSFET, whi ch helps to achieve fast
and high contrast ratio PWM dimming.
The PWM dimming signal is also u sed for the
CC/CV mod e control. At PWM on interval, the
CC mode is effect ive and the LE D current is
regulated; at PWM off i nterval, the CV mode is
effective an d the DC b us voltage is regulated.
The gate d riving signal and thus t he energy
through the power stage are continu ous at both
the PWM on interval a nd the PW M off interval.
This helps to eliminate the system audible noise
at PWM dimming.
The MP46 53 features sufficient and smart
protection t o increa se system reliability. It
protects the fault condit ion at both t he DC bus
stage and the LED driver stage.
The protection for the DC bus stage include s
the over voltage prot ection and over current
protection (short protection).
MP4653
Real LIPS CC/CV Mode
LLC TV LED Driver
The protection for the LED driver stage includes
the open LED protection, short LED protection,
over LED current protection and a ny point of
LED string short to ground protection.
Thermal protection is integrated in MP4653.
The MP4653 is available in SOIC20 package.
FEATURES
Secondary Side “Real LIPS” LLC Controller
CC/CV Frequency Control Loop
Audible Noise Elimination
Continuous driving sign al at PWM dimming
and LED fault condition
9V to 30V Input Voltage Range
Analog and PWM Dimming
Input Under Voltage Lockout
DC Bus Output Over Voltage Protection
DC Bus Short Protection
System Auto-recovery and Hiccup Timer
LED Open, Short Protection
LED Output Over Voltage, Over LED
Current Protection
Any Point of LED String Short to GND
Protection
Available in SOIC 20 Package
APPLICATIONS
LCD TVs and Monitors
Desktop LCD Flat Panel Displays
Flat Panel Video Displays
Street Lighting
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance “MPS”
and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
MP4653 Rev 1.01
6/28/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
1
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MP4653 pdf
MP4653—REAL LIPS CC/CV MODE LLC TV LED DRIVER
ELECTRICAL CHARACTERISTICS (continued)
VIN = 12V, TA = +25C, unless otherwise noted.
Parameter
Symbol Condition
LED sho rt threshold for slow
action
VIFBSC
Delay time for slow action
Tdelay_IFB
300mV<VIFB<600mV
Internal Current Loop Compensation Transconductance Opamp (ICOMP)
Gain Bandwidth product
GB_I
75pF on ICOMP
Open Loop DC Gain
AV_I ICOMP open
Input Common-mode range
Transconductance Gm_I
VCM_I
Saturated output current
Isat_I
Low level clamp voltage
VICOMP_L Normal operation
High level clamp votlage
VICOMP_H Normal operation
Min
270
100
60[6]
-0.3[6]
35
0.95
2.15
DC Bus Voltage Feedback (VFB)
Sampling Delay Time
Minimum clamp voltage
Maximum clamp voltage
Tdealy_sample PWM
Vmin_clamp_VFB
Vmax_clamp_VFB
falling edge
1.1
1.9
Internal Voltage Loop Compensation Transconductance Opamp (VCOMP)
Gain Bandwidth product
GB_V
75pF on VCOMP
Open Loop DC Gain
AV_V
VCOMP open
60[6]
Low level clamp voltage
VVCOMP_L Normal operation
0.95
High level clamp votlage
VVCOMP_H Normal operation
2.15
Transconductance
Gm_V
Saturated output current
Isat_V
35
Over LED Voltage Protection (VLED1~VLED4)
Over LED Voltage Protectio
Threshold
n VTH(OVP_LED)
2.25
Over LED voltage delay time
Gain of differential voltage
Tdelay_VLED
1.7
14.7
Internal resistance
RVLED
Hiccup mode fault delay timer(ICOMP, VCOMP)
ICOMP Valley Threshold
ICOMP Peak Threshold
ICOMP charging current at hiccu p
mode
Vth_low(ICOMP)
Vth_peak(ICOMP)
Icharge_fault(ICOMP)
ICOMP di scharging current at
hiccup mode
VCOMP Valley Threshold
Idischarge_fault(ICOM
P)
Vth_low(VCOMP)
1.6
19
0.35
2.7
1.6
0.35
Typ
300
200
1.0[6]
830
50
1
2.2
1.2
2
1.0[6]
1
2.2
160
50
2.40
2.3
16.3
23
0.45
3
2
2
0.45
Max Units
330 mV
350 μs
4[6]
65
1.05
2.25
MHz
dB
V
μA/V
μA
V
V
100[6]
1.3
2.1
ns
V
V
MHz
dB
1.05 V
2.25 V
μA/V
65 μA
2.55 V
2.9
17.9
27
μs
kΩ
0.55
3.3
2.4
V
V
µA
2.4
0.55
µA
V
MP4653 Rev 1.01
6/28/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
5

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MP4653 arduino
MP4653—REAL LIPS CC/CV MODE LLC TV LED DRIVER
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Performance waveforms are tested on the evaluation board of the Design Example section.
VIN = 12V, 400V_bus=380V, VLED = 120V, ILED=130mA*4 strings, DC/DC output=12V/1.5A, TA =
25°C, unless otherwise noted.
Start Up with CV Mode
Start Up with CC Mode
Shut Down at CV Mode
12V OUTPUT
10V/div.
VGR
5V/div.
VIN_IC
10V/div.
VBUS
10V/div.
VGL
5V/div.
VBUS
10V/div.
VFSET
1V/div.
ILED
200mA/div.
VGL
5V/div.
VFSET
500mV/div.
VBUS
5V/div.
IPRI
1A/div.
Shut Down at CC Mode
Steady State
VGL
5V/div.
VFSET
1V/div.
VBUS
5V/div.
ILED
200mA/div.
VGL
5V/div.
VFSET
500mV/div.
VBUS
5V/div.
ILED
200mA/div.
PWM Dimming, 50%, 480Hz
VGL
5V/div.
VFSET
500mV/div.
VBUS
5V/div.
ILED
200mA/div.
Analog Dimming
ADIM=0.655V
VGL
5V/div.
VFSET
500mV/div.
VBUS
5V/div.
ILED
200mA/div.
PWM Dimming+ Analog
Dimming
Open LED Protection
VGL
5V/div.
VGL
5V/div.
VFSET
500mV/div.
VBUS
5V/div.
ILED
200mA/div.
VOPEN
50V/div.
VICOMP
1VVB/dUivS.
5V/div.
MP4653 Rev 1.01
6/28/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
11

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