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PDF MAP3301C Data sheet ( Hoja de datos )
| Número de pieza | MAP3301C | |
| Descripción | Single Channel LED Driver | |
| Fabricantes | MagnaChip | |
| Logotipo |  |
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Confidential
Datasheet Version 1.1
Datasheet - MAP3301C
Single Channel LED Driver with Internal Dimming MOSFET
General Description
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).
Features
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
MAP3301CSIRH
Top
Marking
MAP3301C
Ambient
Temperature Range
-40℃ to +85℃
Typical Application
Package
SOIC-15 Pin
RoHS Status
Halogen Free
December 2012
Page 1
1 page  
Confidential
Datasheet Version 1.1
Electrical Characteristics
VCC=12V, VPWMI=5V, CGATE=1nF, Ta=25℃, unless otherwise specified
SYMBOL
PARAMETER
SUPPLY
VCC,OP
Input voltage range
ISD Shut down current
IQ Operation quiescent current
IOP Operation Current
VEN_L: Logic Low
VEN
VEN_H : Logic High
REN Enable pull down resistor
VUVLO
Under-voltage release threshold
Under-voltage lockout hysteresis
VLDO & VDD
VLDO
Reference pin voltage
VLDOLI
VLDOLO
VDD
Oscillator
FOSC
DMAX
GATE
ISOURCE
ISINK
TRISE
TFALL
VGATE
Line regulation
Load regulation
Gate Drive voltage
Oscillator frequency
Maximum duty cycle
Gate short circuit current
Gate sink current
GATE output rise time
GATE output fall time
Gate Output Voltage
TEST CONDITION
Ta = - 40℃ ~ 85℃
EN = 0V
PWMI = 0V, EN = 5V
PWMI = 5V, EN = 5V
-
-
EN = 5V
-
-
Ta = - 40℃ ~ 85℃
Ta = 25℃
Iref = 0uA, PWMI = 0V,
Cref = 0.1uF
Iref = 0~500uA, PWMI = 0V,
Cref = 0.1uF
Ta = 25℃, Vcc > 12V, No load
-
-
VGATE = 0, VCC = 12V
VGATE = 10V, VCC = 12V
CGATE = 1nF, VCC = 12V
CGATE = 1nF, VCC = 12V
-
MIN
8.5
40
-
-
-
2.0
60
7.5
-
4.90
4.95
-
-
-
95
-
0.05
0.15
-
-
-
TYP
-
80
2.5
10
-
-
120
8
1
5.00
5.00
-
-
10
100
90
0.18
0.28
50
25
10
MAX UNIT
33 V
160 uA
5.0 mA
- mA
0.8 V
-V
240 ㏀
8.5 V
-V
5.10
5.05
0.02
1
-
V
V
%/V
%/mA
V
105 kHz
-%
-A
-A
- nS
- nS
-V
December 2012
Page 5
5 Page 
Confidential
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 × RO(max) × TS(min)
2
Where,
R0(max) = Maximum output impedance
TS(min) = Minimum Switching Period
L(Inductance)
L(Inductance)
> L(critical) → CCM
< L(critical) → DCM
D = 1- VIN ,
VOUT
RO(max)
=
VOUT
IOUT
,
1
TS(min) = 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.
Datasheet Version 1.1
December 2012
Page 11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet MAP3301C.PDF ] | |
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