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PDF MP4032-1 Data sheet ( Hoja de datos )
| Número de pieza | MP4032-1 | |
| Descripción | Offline LED Driver | |
| Fabricantes | MPS | |
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MP4032-1
Primary-Side-Controlled, Offline LED Driver
with Fully-Integrated Internal MOSFET
The Future of Analog IC Technology
DESCRIPTION
The MP4032-1 is a TRIAC-dimmable, primary-
side-controlled, offline, LED lighting driver with
an integrated 500V MOSFET. It can achieve a
high power factor and accurate LED current
control for lighting applications in a single-stage
converter. The proprietary real-current control
can accurately control the secondary-side LED
current using primary-side information. It
simplifies LED lighting systems and increases
efficiency by removing the secondary feedback
components and the current-sensing resistor.
The MP4032-1 has a power-factor-correction
function and works in boundary-conduction
mode that reduces power losses. The DRAIN
pin can supply current to the internal charging
circuit for start-up without a perceptible delay.
The proprietary dimming control extends the
TRIAC-based dimming range.
The multiple protections greatly enhance
system reliability and safety. These protections
include VCC under-voltage lockout, LED over-
voltage and over-current protections, short-
circuit protection, and over-temperature
protection.
The MP4032-1 is available in an SOIC8-7A
package.
FEATURES
• Real Current Control without Secondary
Feedback Circuit
• Internal MOSFET with 500V High Voltage
Rating
• Less than 6W Output Power
• Internal Charging Circuit for Fast Start-Up
• Accurate Line Regulation
• Flicker-Free, Phase-Controlled TRIAC
Dimming with Extended Dimming Range
• High Power Factor
• Boundary-Conduction Mode
• VCC UVLO
• Cycle-by-Cycle Current Limiting
• Over-Voltage Protection
• Short-Circuit Protection
• Over-Temperature Protection
• Available in SOIC8-7A Package
APPLICATIONS
• Solid-State Lighting
• Industrial and Commercial Lighting
• Residential 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 page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
The MP4032-1 is patent pending.
Warning: Although this board is designed to satisfy safety
requirements, the engineering prototype has not been agency
approved. Therefore, all testing should be performed using an
isolation transformer to provide the AC input to the prototype
board.
MP4032-1 Rev. 1.02
www.MonolithicPower.com
7/15/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1
1 page  
MP4032-1—PRIMARY-SIDE-CONTROLLED, OFFLINE LED DRIVER WITH FULLY-INTEGRATED MOSFET
ELECTRICAL CHARACTERISTICS (continued)
VCC = 16V, TA = +25°C, unless otherwise noted.
Parameter
Symbol Condition
Zero Current Detector
Minimum Off Time
τOFF_MIN
Internal MOSFET
Drain-Source
Voltage
Breakdown
Drain-Source On-Resistance
BVDSS
RDS(ON)
VCC<6V, ID=10μA
Vcc=16V,
ID=200mA
Vcc=UVLO+80mV,
ID=200mA
TJ=25oC
TJ=125oC
TJ=25oC
TJ=125oC
TRIAC Phase Dimming
Maximum Dimming Phase
Dimming Detect Threshold
VMULT_H
VMULT_L
The max setting brightness
VMULT rising edge
VMULT falling edge
Starter
Start Timer Period
τSTART
Notes:
5) The multiplier output is given by: VCS=K•VMULT• (VCOMP-1.5)
6) Guaranteed by design.
Min Typ Max Units
4.2 5.6 7 μs
500
6.5
10.5
7
9
14
9.5
11 15
V
Ω
74
0.305
0.12
75
0.335
0.145
76
0.365
0.17
%
V
V
105 130
155 µs
MP4032-1 Rev. 1.02
www.MonolithicPower.com
7/15/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
5
5 Page 
MP4032-1—PRIMARY-SIDE-CONTROLLED, OFFLINE LED DRIVER WITH FULLY-INTEGRATED MOSFET
OPERATION
The MP4032-1 is a TRIAC-dimmable, primary-
side-controlled, offline, LED driver with an
integrated high-voltage MOSFET. It incorporates
multiple features specifically for high-
performance LED lighting. It uses a real-
current-control method using primary-side
information to accurately control LED current. It
can achieve a high power factor to eliminate
pollution on the AC-line.
System Start-Up and Power Supply
The VCC pin supplies power to both the control
signal and the gate drive signal. After connecting
the AC line, the VCC capacitor charges from the
DRAIN pin through an internal high-voltage
DRAIN charger. Once VCC reaches 13.8V, the
control logic initiates and the gate drive signal
forces the integrated high-voltage power
MOSFET to begin switching for normal operation.
Meanwhile, the DRAIN charger stops. The
auxiliary winding takes over the power supply
after charging.
If VCC drops below 9.4V without fault, the DRAIN
charger resumes function to charge VCC back to
13.8V. If a fault occurs, the system stops
switching and the auto-restart function activates
once VCC drops to 7.5V.
Power-Factor Correction
The MULT pin connects to the tap of the resistor
divider from the rectified instantaneous line
voltage. It is one of the inputs of the Multiplier.
The multiplier’s output has a sinusoidal shape.
This signal provides the reference for the current
comparator, and is compared with the primary-
side inductor current sensed by the CS pin: The
CS pin shapes the primary-peak-current
envelope sinusoid to match the input line voltage.
This control method can achieve a high power
factor.
Multiplier output
Inductor current
Input average current
The maximum voltage of the multiplier output to
the current comparator is clamped to 2.27V to
limit the cycle-by-cycle current.
Boundary-Conduction Mode
During the internal MOSFET ON time (τON), the
rectified input voltage (VBUS) applies to the
primary-side inductor (Lm), and the primary
current (Ipri) increases linearly from zero to the
peak value (Ipk). When the internal MOSFET
turns off, the energy stored in the inductor
transfers to the secondary side and turns on the
secondary-side diode to power the load. The
secondary current (Isec) then decrease linearly
from the peak value to zero. When the secondary
current reaches zero, the primary-side leakage
inductance, magnetizing inductance and all the
parasitic capacitances decrease the MOSFET
drain-source voltage—this decrease is also
reflected on the auxiliary winding (see Figure 3).
The zero-current detector on the ZCD pin
generates the internal MOSFET’s turn-on signal
when the ZCD voltage falls below 0.35V, and
ensures that the MOSFET turns on at a valley
voltage (see Figure 4).
VDS
VBUS +NVOUT
VBUS
turn-on
Ipk
Inductor
current
I pri
I sec / N
t off
t on
VZCD
0
Figure 3: Boundary-Conduction Mode
Figure 2: Power-Factor Correction
MP4032-1 Rev. 1.02
www.MonolithicPower.com
7/15/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
11
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| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet MP4032-1.PDF ] | |
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