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PDF ACE722A Data sheet ( Hoja de datos )
| Número de pieza | ACE722A | |
| Descripción | 2A PWM BUCK DC-DC Converter | |
| Fabricantes | ACE Technology | |
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Technology
ACE722Awww.DataSheet4U.com
2A PWM BUCK DC-DC Converter
Description
ACE722A is a 420kHz fixed frequency PWM buck (step-down) DC-DC converter, capable of driving a 2A
load with high efficiency, low ripple and excellent line and load regulation. The device includes a voltage
reference, an oscillation circuit, an error amplifier, an internal PMOS and etc.
The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. The enable function, over
current protection function, short circuit protection function and soft-start function are built inside. When
OCP or SCP happens, the operation frequency will be reduced from 420kHz to 40kHz. An internal
compensation block is employed to minimize external components.
The ACE722A serves as an ideal power supply unit for portable devices, especially for chip set power in
portable systems. It’s widely used for PDVD, LCD monitor and DPF chip set powers.
Features
• 2A Constant Output Current
• 130mΩ RDSON Internal Power MOSFET Switch
• Up to 94% Efficiency
• Fixed 420kHz Frequency
• Wide 4.75V to 25V Input Voltage Range
• Output Voltage Adjustable from 0.8V to 21V
• Built in Thermal Shutdown Function
• Built-in Current Limit Function
• Built-in Soft-Start Function
• Support Ceramic or Electrolytic Capacitors
Application
• Portable DVE
• LCD Monitor/LCD TV
• Digital Photo Frame
• ADSL
• Set-up Box
Absolute Maximum Ratings
Parameter
Symbol Max Unit
Input Voltage
VIN
-0.3 to 30
V
FB Pin Voltage
VFB
-0.3 to 6
V
EN Pin Voltage
VEN
-0.3 to VIN
V
COMP Pin Voltage
VCOMP
-0.3 to 6
V
SW Pin Voltage
VSW -0.3 to VIN V
Power Dissipation
PD Internally Limited mW
Thermal Resistance (Junction to Ambient, No Heat Sink, Free AIR) θJA
100 OC/W
Operating Junction Temperature
TJ 150 OC
Storage Temperature
TSTG
-65 to 150
OC
Lead Temperature (Soldering, 10sec)
TLEAD
260
OC
ESD (Human Body Model)
ESD
2000
V
VER 1.2 1
1 page  
Technology
ACE722Awww.DataSheet4U.com
2A PWM BUCK DC-DC Converter
Input Voltage (V)
Figure 3. Supply Quiescent Current vs. Input Voltage
Input Voltage (V)
Figure 4. Efficiency vs. Input Voltage
Input Voltage (V)
Figure 5. Shutdown Quiescent Current vs. Input Voltage
Temperature (℃)
Figure 6. OCP Current Limit vs. Temperature
Temperature (℃)
Figure 7. Feedback Voltage vs. Temperature
Input Voltage (V)
Figure 8. OCP Current Limit vs. Input Voltage
VER 1.2 5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet ACE722A.PDF ] | |
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