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PDF ACE714B Data sheet ( Hoja de datos )
| Número de pieza | ACE714B | |
| Descripción | Step-up DC/DC Converter Backlight Driver | |
| Fabricantes | ACE Technology | |
| Logotipo |  |
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ACE714B
Step-up DC/DC Converter Backlight Driver
Description
The ACE714B is a fixed frequency, constant current step-up DC/DC converter ideal for driving LEDs
used in backlighting applications on cellular phones, PDAs and digital cameras etc. Output voltage of up
to 28V can be derived, and from a 2.5V input three white LED’s can be driven in series. Luminance of the
LED’s is controlled by changing the duty cycle of a PWM signal applied to the CE pin. In addition, an
internal MOSFET with an Rds-on of 0.3Ω is used. Allow profile and small board area solution can be
achieved using a chip coil and an ultra small ceramic output capacitor.
Features
Input voltage range : 2.5V-5.5V
Output voltage range : up to 28V
Low 104mV feedback voltage
Oscillation frequency : 1.2MHz
Typical Efficiency : 88%.
Control : PWM control.
Stand-by Current : <1μA
High Supply Capability: Deliver 10V 300mA from 3.5V supply
Lx limit Current : 1.3A
Application
For White LED Drivers
Mobil phones, PHS, PDAs, Digital still cameras
Absolute Maximum Ratings
Parameter
Symbol
Value
Unit
Vin Voltage
VIN
VSS-0.3~VSS+6
V
Output Voltage
VOUT
VSS-0.3~VSS+30
V
LX Voltage
VLX
VSS-0.3~VSS+30
V
FB Voltage
VFB
VSS-0.3~VSS+6
V
CE Voltage
VCE
VSS-0.3~+6
V
OVP Voltage
VOVP
VSS-0.3~VSS+30
V
Power Dissipation
PD 600 mW
Operating Junction Temperature
TOPR
-25 to +85
℃
Storage Temperature Range
TSTG
-40 to +125
℃
Caution: The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These
values must therefore not be exceeded under any conditions.
VER 1.2 1
1 page  
ACE714B
Step-up DC/DC Converter Backlight Driver
Notes
ACE does not assume any responsibility for use as critical components in life support devices or systems
without the express written approval of the president and general counsel of ACE Electronics Co., LTD.
As sued herein:
1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and shoes failure to perform when properly used in
accordance with instructions for use provided in the labeling, can be reasonably expected to result in
a significant injury to the user.
2. A critical component is any component of a life support device or system whose failure to perform can
be reasonably expected to cause the failure of the life support device or system, or to affect its safety
or effectiveness.
ACE Technology Co., LTD.
http://www.ace-ele.com/
VER 1.2 5
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet ACE714B.PDF ] | |
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