MGCHIP MAP3301CSIRH Single channel led driverwith internal dimming mosfet Datasheet

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Datasheet Version 1.1
Single Channel LED Driver with Internal Dimming MOSFET
General Description
Features
MAP3301C is a single channel boost type PWM driver
with high efficiency. It is designed for high brightness
LED driver optimized of backlighting system for LCD
module.
MAP3301C provides small solution size with internal
high voltage & current dimming MOSFET and internal
references.
MAP3301C offers the function of accurate and fast
LED dimming control using PWM interface.
MAP3301C has the input line under voltage protection,
LED Open/Short protection and Power Good
indication.
MAP3301C is available in SOIC-15 Pin package with
Halogen-free (fully RoHS compliant).
Wide input voltage : 8.5V ~ 33V
Internal Dimming MOSFET
PWM & Analog Dimming
Current Mode Control Type
Fixed Switching frequency : 100KHz
Auto Restart Mode Protection
Programmable Output Over Voltage Protection
Programmable Input Line Voltage Protection
LED Short Current Protection
Power Good Indication (Open Drain)
Small package : SOIC-15 Pin
Applications
High Brightness white LED backlighting for LCD
TVs and monitors
General LED lighting applications
Ordering Information
Part Number
Top
Marking
Ambient
Temperature Range
Package
RoHS Status
MAP3301CSIRH
MAP3301C
-40℃ to +85℃
SOIC-15 Pin
Halogen Free
Typical Application
December 2012
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MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
Datasheet - MAP3301C
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Datasheet Version 1.1
MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
Pin Configuration
Pin Description
PIN NO
December 2012
Description
1
VDD
Output for Gate drive voltage
2
GATE
Gate drive Output for Boost Convert
3
CS
4
GND
Current sense of the Boost Convert
Ground
5
ADIM
Analog Dimming using DC voltage level
6
VLDO
Reference voltage
7
PGOOD
8
SOU
Internal Dim MOSFET Source
9
DRN
Internal Dim MOSFET Drain
11
COMP
12
OVP
Over Voltage Protection
13
LUVP
Input Line Under Voltage Protection
14
PWMI
PWM Dimming Input
15
EN
16
VCC
Output power good indication
(Open-Drain status output, Normal : Open, Protection : Internal GND)
Error Amp. Compensation
Enable
Input Power Supply
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Datasheet Version 1.1
MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
Functional Block Diagram
December 2012
Page 3
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Datasheet Version 1.1
PARAMETER
VCC
GATE, PWMI, LUVP, VDD
VLDO, CS, COMP, ADIM, PGOOD, SOU, OVP, EN
DRN Voltage
DRN Current
Operating Junction Temperature Range
Absolute Temperature Range(1)
Storage Temperature Range
Lead temperature(soldering, 10sec )
Thermal Resistance (θJA)
VALUE
UNIT
-0.3 ~ 36
-0.3 ~ 20
-0.3 ~ 5
250
6.2
-40 ~ 125
-40 ~ 150
-65 ~ 150
260
70
V
V
V
V
A
℃
℃
℃
℃
℃/W
Note 1 : Normal electrical operating is not guaranteed out of the operating junction temperature range.
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MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
Absolute Maximum Ratings
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Datasheet Version 1.1
VCC=12V, VPWMI=5V, CGATE=1nF, Ta=25℃, unless otherwise specified
SYMBOL
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
SUPPLY
VCC,OP
Input voltage range
Ta = - 40℃ ~ 85℃
8.5
-
33
V
ISD
Shut down current
EN = 0V
40
80
160
uA
IQ
Operation quiescent current
PWMI = 0V, EN = 5V
-
2.5
5.0
mA
IOP
Operation Current
PWMI = 5V, EN = 5V
-
10
-
mA
VEN_L : Logic Low
-
-
-
0.8
V
VEN_H : Logic High
-
2.0
-
-
V
60
120
240
㏀
VEN
REN
Enable pull down resistor
EN = 5V
Under-voltage release threshold
-
7.5
8
8.5
V
Under-voltage lockout hysteresis
-
-
1
-
V
Ta = - 40℃ ~ 85℃
4.90
5.00
5.10
V
Ta = 25℃
4.95
5.00
5.05
V
-
-
0.02
%/V
-
-
1
%/mA
-
10
-
V
VUVLO
VLDO & VDD
VLDO
Reference pin voltage
VLDOLI
Line regulation
VLDOLO
Load regulation
VDD
Gate Drive voltage
Iref = 0uA, PWMI = 0V,
Cref = 0.1uF
Iref = 0~500uA, PWMI = 0V,
Cref = 0.1uF
Ta = 25℃, Vcc > 12V, No load
Oscillator
FOSC
Oscillator frequency
-
95
100
105
kHz
DMAX
Maximum duty cycle
-
-
90
-
%
GATE
ISOURCE
Gate short circuit current
VGATE = 0, VCC = 12V
0.05
0.18
-
A
ISINK
Gate sink current
VGATE = 10V, VCC = 12V
0.15
0.28
-
A
TRISE
GATE output rise time
CGATE = 1nF, VCC = 12V
-
50
-
nS
TFALL
GATE output fall time
CGATE = 1nF, VCC = 12V
-
25
-
nS
VGATE
Gate Output Voltage
-
10
-
V
December 2012
-
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MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
Electrical Characteristics
Confidential
Datasheet Version 1.1
VCC=12V, VPWMI=5V, CGATE=1nF, Ta=25℃, unless otherwise specified
SYMBOL
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
-
100
-
375
nS
Current Sense
TBLANK
Leading Edge Blanking
TDELAY
Delay to output of CS comparator(3)
VCOMP = 5V
VCS = 0V to 600mV step pulse
-
-
180
nS
VCS,MAX
Maximum CS Voltage
VCC = 12V, VADIM – VSOU = 0.2V
0.44
0.49
0.54
V
Internal Transconductance Opamp
AV
Open loop DC Gain(3)
-
-
53
-
dB
VCM
Input common-mode range
-
0.1
-
3.0
V
Output Voltage Low Limit
VCC = 12V, VADIM – VSOU = 0.2V
-
0.6
-
V
Output Voltage High Limit
VCC = 12V, VADIM – VSOU = 0.2V
-
2.6
-
V
VO
Gm
Transconductance(3)
-
400
670
1000
uA/V
IBIAS
Input Bias current
-
-
0.5
1
nA
VOFFSET
Input offset voltage
-
-5
-
5
mV
I_AMP_SOURCE
AMP Source Current
VADIM = 2V, VSOU = 1V, VCOMP = 1.5V
-
-100
-
uA
I_AMP_SINK
AMP Sink Current
VADIM = 1V, VSOU = 2V, VCOMP = 1.5V
-
100
-
uA
PWM Input
VPWMI(LO)
PWMI input Low voltage
-
-
-
0.8
V
VPWMI(HI)
PWMI input High voltage
-
2.0
-
-
V
RPWMI
PWMI pull-down resistance
50
100
200
㏀
VPWMI = 5V
PWM Output
TRISE.DELAY
PWMI_HIGH to DRN On Delay time
-
-
1.0
1.5
uS
TFALL.DELAY
PWMI_LOW to DRN Off Delay time
-
-
0.8
1.2
uS
Time for internal soft-start
-
-
20
-
mS
Soft-Start
TSS
December 2012
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MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
Electrical Characteristics (Continued)
Confidential
Datasheet Version 1.1
VCC=12V, VPWMI=5V, CGATE=1nF, Ta=25℃, unless otherwise specified
SYMBOL
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
-
-
2
-
mS
2.94
3.0
3.06
V
-
2.7
-
V
-
200
-
nS
Auto Restart Protection ( OVP & LUVP & SCP )
TAR
Auto Restart Time
Over Voltage Protection ( OVP )
VOVP
Over voltage protection
VOVPH
Over voltage protection release
voltage
TOVP
OVP Filtering time(3)
-
Line Under Voltage Protection ( LUVP )
VLINE
Line under voltage protection
-
1.7
1.8
1.9
V
VLINEH
Line under voltage protection release
voltage
-
-
2.0
-
V
TLUVP
LUVP Filtering time(3)
-
-
200
-
nS
1.8
2.0
2.2
V
Short current protection ( SCP )
VADIM = 0.5V
(VTH,SCP = VADIM * 4)
VTH,SCP
SCP Comparator threshold voltage
VSCP
SCP Comparator input range
-
1.4
-
4.0
V
TOFF
Propagation time for short current
detection (3)
-
-
-
250
nS
-
10
100
ohm
250
-
-
V
Power Good Indication – Open Drain (Normal : Open, Abnormal : Internal GND)
RPGOOD
Power Good on resistance(3)
VPGOOD = 1V
Internal Dimming MOSFET
BVDSS
Drain-Source Breakdown Voltage
ID = 250µA, VCC = 0V
IDSS
Drain Cut-Off Current
VDS = 250V, VPWMI = 0V
-
-
1
uA
RDS(ON)
Drain-Source ON Resistance
VGS = 10V, ID = 3.1A
-
-
1
Ω
Shutdown Temperature
-
150
-
TSD
Thermal Shutdown Temperature
Hysteresis, ∆TSD
-
30
-
°C
Note 2 : Stress beyond the maximum ratings listed above may incur permanent damage to the device. Operating above the
recommended conditions for extended time may stress the device and affect device reliability. Also the device may not operate
normally above the recommended operating conditions. These are stress ratings only.
Note 3 : These parameters, although guaranteed by design, are not tested in mass production.
December 2012
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MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
Electrical Characteristics (Continued)
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Datasheet Version 1.1
MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
Typical Operating Characteristics
Unless otherwise noted, VCC = 12V, VPWMI= 5V.
Quiescent Current vs. Temp
VLDO vs. Temp
Operation Current vs. Temp
VDD vs. Temp
Fosc vs. Temp
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Datasheet Version 1.1
Current Mode Boost switching regulator
operation
MAP3301C is being used Current mode control scheme for
boost regulation so its response is fast and output voltage is
stable.
Supply voltage and Oscillator
MAP3301C has wide input voltage ranged from 8.5V to 33V.
1uF decoupling capacitor is used to stabilize the internal
regulator and minimize noise on VCC pin. This decoupling
capacitor should be placed next to VCC pin. Ceramic
capacitor is recommended and incorrect placement of this
decoupling capacitor may cause the oscillation in the
switching waveform
MAP3301C is being operated at fixed 100Khz Switching
frequency and max duty is 90%.
LED Current Input setting (ADIM Input)
MAP3301C’s LED current is set by the voltage on ADIM pin
and LED sense resistor value as below.
PWM Input
High (2.0V)
Low (0.8V)
Condition
Enable
Disable
Enable Input
MAP3301C’s offers an Enable Function. MAP3301C is
enabled when EN voltage is higher than 2.0V and disabled
when EN voltage is lower than 0.8V. This pin has internal
120Kohm pull down resistance
EN Input
High (2.0V)
Low (0.8V)
Condition
Enable
Disable
Protection
MAP3301C has Under Voltage Lock Out (UVLO), Boost
switch current limit, Output Over Voltage Protection (OVP),
Line Under Voltage Protection(LUVP), LED Short Current
Protection(SCP).
When OVP and LED SCP are happened, MAP3301C
monitors if the failure condition is released or not every
2mS at Fs 100Khz.
This is MAP3301C’s auto restart function.
1. Under Voltage Lock Out (UVLO)
When VCC is higher than 8.0V, MAP3301C’s internal 5V
regulator and internal circuitry like oscillator, protections,
Gate drivers and PDIMO drivers are enabled, and the
MAP3301C starts to operate when PWMI voltage and EN
signal are higher than 2.0V.
If VCC is lower than 7.0V, MAP3301C is disable due to its
under voltage lock out.
Fig 1. Schematic for LED current set
2. Boost current limit and Current Sense (CS)
ILED =
VADIM
LED _ Current _ Sense _ R
The voltage range on ADIM pin is 0.1V ~ 3.0V. But it is
recommended that ADIM Input voltage is higher than 0.4V.
The GM Amp Input VOFFSET is ±5mV. If ADIM voltage use to
below 0.4V, LED current tolerance is increases.
Dimming PWM Input
MAP3301C’s PWMI signal is used for both Enable and PWM
dimming input. MAP3301C is enabled when PWMI voltage is
higher than 2.0V and disabled when PWMI voltage is lower
than 0.8V. This pin has internal 100Kohm pull down
resistance.
December 2012
MAP3301C has the Boost current limit function. If the
voltage on CS pin is higher than 0.49V (Typ.), the gate
pulse is limited every pulse. MAP3301C has 100nS
(Min.) leading edge blank.
3. Output Over Voltage Protection (OVP)
When MAP3301C’s output voltage is increased
abnormally, MAP3301C stops the switching to protect
external components.
MAP3301C has 200nS (Typ.) low pass filter on OVP pin,
but using external Capacitor is recommended to
minimize noise. The total values of ROVPH and ROVPL
need to be lower than 1Mohm.
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MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
Application Information
Confidential
Datasheet Version 1.1
- OVP set voltage :
VO = 3.0 ×
ROVPH + R OVPL
R OVPL
6.
Auto-Restart Protection
The MAP3301C offers Auto Restart protection function
which is recovered into normal operation mode when
protection condition is cleared. The auto restart time
(TAR) is 2mS at Fs 100Khz.
It is recovered to normal operating mode if SCP or OVP
or LUVP condition is cleared.
- OVP release voltage :
VO = 2.7 ×
R OVPH + R OVPL
R OVPL
4. Line Under Voltage Protection (LUVP)
When Line voltage is low voltage input, to prevent the stress
of the transition for power component, MAP3301C stops the
switching to protect external components.
7.
Power Good (PGOOD)
MAP3301C has the PGOOD pin to send out the LED
current status. PGOOD will be high when the LED current
is higher than 70% of normal LED current.
1)
Power Good scheme at OVP Protection.
MAP3301C has 200nS (Typ.) low pass filter on LUVP pin, but
using external Capacitor is recommended to minimize noise.
The total values of RLUVPH and RLUVPL need to be lower than
1Mohm.
LUVP threshold voltage is 2.0V and LUVP voltage can be set
as below.
- LUVP set voltage :
VIN = 1.8 ×
RLUVPH + RLUVPL
RLUVPL
- LUVP release voltage :
R
+ RLUVPL
VIN = 2.0 × LUVPH
RLUVPL
When OVP happens, PGOOD is low and latch
immediately.
PGOOD reset should be only shut down of IC Vcc or
EN Signal
2)
Power Good scheme at SCP Protection.
5. LED Short Current Protection (SCP)
To protect external components, MAP3301C has the LED
short protection. If the LED SCP threshold voltage changes
based on ADIM voltage as below, so if SOU voltage is higher
than LED SCP threshold voltage, MAP3301C will be in LED
SCP mode disabling gate for boost MOSFET and dimming
MOSFET.
When SCP happens, PGOOD is low and latch immediately.
PGOOD reset should be only shut down of IC Vcc or EN
signal.
3)
PGOOD Pull up resistance is recommending over
than 100Kohm.
.
Fig 2. SCP threshold voltage based on ADIM voltage
December 2012
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MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
OVP threshold voltage is 3.0V and OVP voltage can be set
as below.
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Datasheet Version 1.1
MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
Inductor Selection
Inductor value should be decided before system design.
Because the selection of the inductor affects the operating
mode of CCM (Continuous current mode) or DCM
(Discontinuous current mode), In CCM operation, inductor size
should be bigger, even though the ripple current and peak current
of inductor can be small.
In DCM operation, even ripple current and peak current of
inductor should be large while the inductor size can be smaller so
that it is more effective in BLU of TV and Notebook application.
The following is the equation to calculate max value of Inductor.
L ( critical) =
(1 - D)2 × D × R O(max) × TS(min)
2
Where,
R0(max) = Maximum output impedance
TS(min) = Minimum Switching Period
L(Inductance)
L(Inductance)
D = 1-
VIN
VOUT
,
> L(critical) → CCM
< L(critical) → DCM
R O(max) =
VOUT
IOUT
,
TS(min) =
1
FS
Loop Compensation
The MAP3301C controls in current mode. Current mode easily
achieves compensation by consisting simple single Pole from
Double Pole that LC filer makes at Voltage mode
In general, crossover frequency is selected from 1/3 ~ 1/6 range of
the switching frequency. If fc is large, there is possibility of
oscillation to occur, although time response gets better.
On the other hand, if fc is small, time response will be bad, while it
has improved stability, which may cause over shoot or under shoot
in abnormal condition.
December 2012
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Datasheet Version 1.1
MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
Physical Dimensions
MagnaChip Semiconductor Ltd. doesn’t not recommend the use of its products in hostile environments, including, without limitation,
aircraft, nuclear power generation, medical appliances, and devices or systems in which malfunction of any product can reasonably
be expected to result in a personal injury. Seller’s customers using or selling Seller’s products for use in such applications do so at
their own risk and agree to fully defend and indemnify Seller.
MagnaChip reserves the right to change the specifications and circuitry without notice at any time. MagnaChip does not consider
responsibility for use of any circuitry other than circuitry entirely included in a MagnaChip product.
is a registered trademark of MagnaChip Semiconductor Ltd.
MagnaChip Semiconductor Ltd.
891, Daechi-Dong, Kangnam-Gu, Seoul, 135-738 Korea
Tel : 82-2-6903-3451 / Fax : 82-2-6903-3668 ~9
www.magnachip.com
December 2012
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Datasheet Version 1.1
MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
Revision History
Date
Version
2012-12-07
Version 1.0
Initial Release.
2012-12-18
Version 1.1
Separate part Number. (MAP3301C & MAP3301)
December 2012
Changes
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