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AX2530 데이터시트 PDF




AXElite에서 제조한 전자 부품 AX2530은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 AX2530 기능
기능 High Precision CC/CV Primary-Side PWM Power Switch
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AX2530 데이터시트, 핀배열, 회로
AX2530
High Precision CC/CV Primary-Side PWM
Power Switch
GENERAL DESCRIPTION
AX2530 is a high performance offline PWM Power switch for low power AC/DC
charger and adapter applications. It operates in primary-side sensing and regulation.
Consequently, opto-coupler and TL431 could be eliminated. Proprietary Constant Voltage
(CV) and Constant Current (CC) control is integrated as shown in the figure below.
In CC control, the current and output power setting can be adjusted externally by the
sense resistor Rs at CS pin. In CV control, multi-mode operations are utilized to achieve
high performance and high efficiency. In addition, good load regulation is achieved by the
built-in cable drop compensation. Device operates in PFM in CC mode as well at large
load condition and it operates in PWM with frequency reduction at light/medium load.
AX2530 offers power on soft start control and protection coverage with
auto-recovery features including Cycle-by- Cycle current limiting, VDD OVP, VDD clamp
and UVLO. Excellent EMI performance is achieved with Power-Source proprietary
frequency shuffling technique.
High precision constant voltage (CV) and constant current (CC) can be achieved by
AX2530.
1/10




AX2530 pdf, 반도체, 판매, 대치품
AX2530
ELECTRICAL CHARACTERISTICS
(TA=25°C, VDD=VDDG=16V, unless otherwise specified)
Characteristics
Symbol
Conditions
Min Typ Max Units
Supply Voltage (VDD) Section
Standby Current
IDD ST
Operation Current
IDD OP
VDD Under Voltage Lockout
Enter
VDD Under Voltage Lockout
Exit
Maximum VDD operation
voltage
Over Voltage protection
voltage
UVLO(ON)
UVLO(OFF)
VDD_clamp
OVP
Current Sense Input Section
VDD=13V
Operation supply current
INV=2V, CS=0V,
VDD=VDDG=18V
VDD falling
- 5 20
- 23
8.2 9.0 10.5
VDD rising
13.5 14.8 16.0
IDD=10mA
27 28.5 30
Ramp
down
VDD
until
gate
shut
26
27.5
29
uA
mA
V
V
V
V
LEB time
TLEB
625 Ns
Over current threshold
Vth_oc
880 910 940 mV
OCP Propagation delay
Td_oc
110 Ns
Input Impedance
ZSENSE_IN
50 KΩ
Soft start time
T_SS
17 ms
Frequency Section
IC Maximum frequency
System Nominal switch
frequency
Freq_Max
(Note)
Freq_Nom
Freq_startup INV=0V, Comp=5V
55 60 65 KHZ
- 50 - KHZ
- 14 - KHZ
Frequency shuffling range Δf/Freq
- +/-6 - %
Error Amplifier section
Reference voltage for EA
Vref_EA
1.97 2 2.03 V
DC gain of EA
Gain
- 60 - dB
Max. Cable
current
compensation I_COMP_MAX INV=2V, Comp=0V
- 37.5 - uA
Note: Freq_Max indicates IC internal maximum clock frequency. In system application, the maximum operation
frequency of 60Khz nominal occurs at maximum output power or the transition point from CV to CC
4/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 Mar.26, 2012

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AX2530 전자부품, 판매, 대치품
AX2530
Fig.2. Auxiliary voltage waveform
Via a resistor divider connected between the auxiliary winding and INV (pin 4), the
auxiliary voltage is Sampled at the end of the demagnetization and it is hold until the next
sampling. The sampled voltage is compared with Vref (2.0V) and the error is amplified.
The error amplifier output COMP reflects the load condition and controls the PWM
switching frequency to regulate the output voltage, thus constant output voltage can be
achieved.
When sampled voltage is below Vref and the error amplifier output COMP reaches
its maximum, the switching frequency is controlled by the sampled voltage thus the output
voltage to regulate the output current, thus the constant output current can be achieved.
Adjustable CC point and Output Power
In AX2530, the CC point and maximum output power can be externally adjusted by
external current sense resistor Rs at CS pin as illustrated in Typical Application Diagram.
The output power is adjusted through CC point change. The larger Rs, the smaller CC
point is, and the smaller output power becomes, and vice versa as shown in Fig.3
Fig.3 Adjustable output power by changing Rs
7/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 Mar.26, 2012

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