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PDF MAP3232 Data sheet ( Hoja de datos )
| Número de pieza | MAP3232 | |
| Descripción | Dual Channel Switch Mode Operating LED Driver | |
| Fabricantes | MagnaChip | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAP3232 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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Confidential
Datasheet Version 1.0
Datasheet - MAP3232
Dual Channel Switch Mode Operating LED Driver
General Description
MAP3232 is high efficiency dual channel boost type
PWM driver in single package. It is designed for high
brightness LED driver optimized for backlighting
system for large size LCD module.
MAP3232 offers the function of accurate and fast LED
dimming control using PWM interface and external
dimming MOSFET.
MAP3232 has the over-voltage protection, UVLO,
LED short current and Boost switch current limit
protection. It has the power good indication as the
interface with TV set
MAP3232 is available in SOIC-24 Pin package with
Halogen-free (fully RoHS compliant).
Features
Dual output into single package
Wide input voltage range : 8.5V ~ 36V
Dual PWM and Analog Dimming
Current Mode Control Type
Adjustable SW frequency : 100kHz ~ 500kHz
10V Gate Drive
Reference voltage : 5.0V±1.0%
Protections :
Boost OCP, OVP, UVLO, LED Short, Boost
Diode Open
Programmable LED Short current Protection
Boost switch current limit protection
Auto-Restart Mode
Power Good
Package : SOIC-24 Pin
For more information, please contact local MagnaChip
sales office in world-wide or visit MagnaChip’s website
at www.magnachip.com.
Applications
High Brightness white LED backlighting for LCD
TVs and monitors
General LED lighting applications
Ordering Information
Part Number
MAP3232SIRH
Top
Marking
MAP3232
Ambient
Temperature Range
-40℃ to +85℃
Typical Application
Package
SOIC-24 Pin
RoHS Status
Halogen Free
November 2012
Page 1
1 page  
Confidential
Datasheet Version 1.0
Electrical Characteristics
Vcc=12V, VPDIMI=5V, CGATE=CPDIMO=1nF, Ta=25℃, unless otherwise specified
SYMBOL
PARAMETER
TEST CONDITION
SUPPLY
Vcc, OP
IQ
IOP
VUVLO
Enable
Input voltage range
Ta = - 40℃ ~ 85℃
Operation quiescent current
PDIMI 1/2 = 0V
Operation Current
PDIMI 1/2 = 5V
Under-voltage lockout release threshold
-
Under-voltage lockout hysteresis
-
VEN Enable Input Voltage on EN Pin
IEN Enable Input Current on EN Pin
REnable
Enable pull-down resistance
VREF & VDD
VREF
Reference pin voltage
VREFLI
VREFLO
VVDD
Line regulation
Load regulation
VDD pin voltage
VEN_L: Logic Low
VEN_H: Logic High
VEN = 0V
-
Ta = - 40℃ ~ 85℃, No load
Ta = 25℃, No load
IREF = 0uA, PDIMI = 0V,
CREF = 0.1uF
IREF = 0~500uA, PDIMI = 0V,
CREF = 0.1uF
Ta = 25℃, No load
Oscillator
FOSC
Oscillator frequency
DMAX
Maximum duty cycle
RRT = 20KΩ, CCT = 390pF,
Ta = 25℃
-
GATE (CH1, CH2)
ISOURCE
ISINK
TRISE
TFALL
Gate short circuit current
Gate sink current
GATE output rise time
GATE output fall time
VGATE = 0, Vcc = 12V
VGATE = 10V, Vcc = 12V
CGATE = 1nF, Vcc = 12V
CGATE = 1nF, Vcc = 12V
MIN
8.5
-
-
7.3
-
-
2.0
-
250
4.90
4.95
-
-
9.0
180
-
0.03
0.15
-
-
TYP MAX UNIT
- 36 V
3 5 mA
- 20 mA
7.8 8.3
V
0.5 -
V
- 0.8
--
2.0 4.0
500 1000
V
V
µA
KΩ
5.00
5.00
-
-
10
5.10
5.05
0.02
1
11.5
V
V
%/V
%/mA
V
200 220 kHz
90 - %
0.06 -
0.3 -
50 100
25 50
A
A
nS
nS
November 2012
Page 5
5 Page 
Confidential
Datasheet Version 1.0
3. Output Over Voltage Protection (OVP)
When MAP3232’s output voltage is increased abnormally,
MAP3232 stops the switching to protect external
components.
MAP3232 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.
OVP threshold voltage is 3.0V and OVP voltage can be
set as below.
- OVP set voltage :
VO
= 3.0 × ROVPH + ROVPL
ROVPL
- OVP release voltage :
VO
=
2.7 × ROVPH + ROVPL
ROVPL
4. Line Under Voltage Protection (LUVP)
When Line voltage is low voltage input, to prevent the
stress of the transition for power component, MAP3232
stops the switching to protect external components.
MAP3232 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 :
VIN
=
2.0 × RLUVPH + RLUVPL
RLUVPL
5. LED Short Current Protection (SCP)
To protect external components, MAP3232 has the LED
short protection. If the LED SCP threshold voltage changes
based on ADIM voltage as below, so if ISEN voltage is
higher than LED SCP threshold voltage, MAP3232 will be
in LED SCP mode disabling gate for boost MOSFET and
dimming MOSFET.
.
Fig 2. SCP threshold voltage based on ADIM voltage
6. Auto-Restart Protection
The MAP3232 offers Auto Restart protection function
which is recovered into normal operation mode when
protection condition is cleared. The auto restart time
(TAR) is 1mS at Fs 200Khz.
It is recovered to normal operating mode if SCP or OVP
condition is cleared.
7. Boost Diode Open Protection (DOP)
When OVP pin voltage is less than 0.1V, a correspond-
-ing comparator turns off the external MOSFET.
This protects the driver from damage if the output
Boost diode is open (defective or poor solder contact).
8. Power Good (PGOOD)
MAP3232 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.
When OVP happens, PGOOD is low and latch
immediately.
PGOOD reset should be only shut down of IC Vcc or
EN Signal
November 2012
Page 11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet MAP3232.PDF ] | |
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