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PDF AP3612 Data sheet ( Hoja de datos )
| Número de pieza | AP3612 | |
| Descripción | Boost Type LED Driver | |
| Fabricantes | BCD Semiconductor | |
| Logotipo |  |
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Preliminary Datasheet
Boost Type LED Driver with 12-Channel Current Source
AP3612
General Description
The AP3612 is a high efficiency boost controller with
12-string current sources for driving WLED backlight.
It operates over a wide input voltage range from 4.5V
to 33V.
The current of 12 strings are simply programmed
from 20mA to 75mA with an external resistor. The
current matching between each string is 1.5% (Typ).
Its operating frequency can be adjusted from 0.1MHz
to 1MHz.
The AP3612 features Cycle-by-cycle Current Limit,
Soft Start, Under Voltage Lock Out (UVLO)
protection, programmable OVP, Over Temperature
Protection (OTP), open/short LED protection, VOUT
short protection and Schottky diode short-circuit
protection.
The AP3612 is available in HSOP-28 and SOIC-24
packages.
Features
• Input Voltage Range: 4.5V to 33V
• Drives up to 12 Strings in Parallel, 75mA per
String
• Programmable WLED Current from 20mA to
75mA
• Adjustable Operating Frequency: 100kHz to
1MHz
• String-to-string Current Matching Accuracy:
1.5%
• Built-in OCP, OTP, UVLO
• External PWM Dimming
• Open/Short LED Protection
• Programmable Soft Start
• Programmable OVP
• Schottky Diode/Inductor Short-circuit Protection
• VOUT Short/Schottky Diode Open Protection
Applications
• LCD Monitor
• LCD Display Module
• LCD TV
HSOP-28
SOIC-24
Aug. 2012 Rev. 1. 1
Figure 1. Package Types of AP3612
BCD Semiconductor Manufacturing Limited
1
1 page  
Preliminary Datasheet
Boost Type LED Driver with 12-Channel Current Source
AP3612
Ordering Information
AP3612
-
Circuit Type
Package
M28: HSOP-28
M: SOIC-24
G1: Green
Blank: Tube
Package
HSOP-28
SOIC-24
Temperature
Range
-40 to 85°C
Part Number
AP3612M28-G1
AP3612M-G1
Marking ID
AP3612M28-G1
AP3612M-G1
Packing Type
Tube
Tube
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Absolute Maximum Ratings (Note 1)
Parameter
Input Voltage
CH1 to CH12 Voltage
EN Pin Voltage
VCC Pin Voltage
CS Pin Voltage
COMP Pin Voltage
ISET Pin Voltage
OUT Pin Voltage
OVP Pin Voltage
RT Pin Voltage
STATUS Pin Voltage
DIM Pin Voltage
GND Pin Voltage
Thermal Resistance
(Junction to Ambient,
Free Air, No Heatsink)
HSOP-28
SOIC-24
Symbol
VIN
VCH
VEN
VCC
VCS
VCOMP
VISET
VOUT
VOVP
VRT
VSTATUS
VDIM
VGND
θJA
Value
-0.3 to 42
-0.3 to 65
-0.3 to 7
-0.3 to 7
-0.3 to 7
-0.3 to 7
-0.3 to 7
-0.3 to 7
-0.3 to 7
-0.3 to 7
-0.3 to 7
-0.3 to 7
-0.3 to 0.3
59
100
Unit
V
V
V
V
V
V
V
V
V
V
V
V
V
ºC/W
Aug. 2012 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
5
5 Page 
Preliminary Datasheet
Boost Type LED Driver with 12-Channel Current Source
AP3612
Typical Performance Characteristics (Continued)
VIN=24V, VEN=VDD=5V, 13 LEDs in series, 12 strings in parallel, 60mA/string, TA=25°C, unless otherwise
specified.
VPWM
5V/div
VSW
20V/div
ICH
50mA/div
Time 2ms/div
Figure 12. PWM Dimming
VSTATUS
5V/div
VSW
50V/div
ICH
100mA/div
VCH
5V/div
Time 10µs/div
Figure 13. LED Short Protection
VSTATUS
5V/div
VSW
50V/div
ICH
50mA/div
VOVP
1V/div
Time 50ms/div
VSW
50V/div
VSTATUS
5V/div
VCS
1V/div
ICH
50mA/div
Time 50µs/div
Figure 14. LED Open Protection
Figure 15. Schottky/Inductor Short Protection
Aug. 2012 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet AP3612.PDF ] | |
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