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IP1203 데이터시트 PDF




International Rectifier에서 제조한 전자 부품 IP1203은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 IP1203 자료 제공

부품번호 IP1203 기능
기능 Single Output Full Function Synchronous Buck Power Block
제조업체 International Rectifier
로고 International Rectifier 로고


IP1203 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




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IP1203 데이터시트, 핀배열, 회로
PD- 96921C
iP1203
www.datasheet4u.com
Features
• 5.5V to 13.2V Input Voltage
• 0.8V to 8V Output Voltage
• 15A Maximum Load Capability
• 200-400kHz Nominal Switching Frequency
• Over Current Hiccup
• External Synchronization Capable
• Overvoltage Protection
• Over Temperature Protection
• Internal Features Minimize Layout Sensitivity
• Very Small Outline 9mm x 9mm x 2.3mm
Single Output Full Function
Synchronous Buck Power Block
Integrated Power Semiconductors,
PWM Control & Passives
iP1203 Power Block
Description
The iP1203 is a fully optimized solution for medium current synchronous buck applications requiring up to 15A.
It includes full function PWM control, with optimized power semiconductor chipsets and associated passives,
achieving high power density. Very few external components are required to create a complete synchronous
buck power supply.
iPOWIRtechnology offers designers an innovative space-saving solution for applications requiring high
power densities. iPOWIR technology eases design for applications where component integration offers benefits
in performance and functionality. iPOWIR technology solutions are also optimized internally for layout, heat
transfer and component selection.
iP1203 Simplified Application Schematic
VIN
VIN OC
VCC_bypass
VSW
FB
PGOOD iP1203
SS
FBS
RT
SYNC
CC
VREF
VOUT
Pin Number
(See Page 18) Pin Name
1, 23
VIN
Pin Description
Input voltage connection pins
2,3,4,5,7,17,20,21 PGND
Power Ground pins
6 VCC_bypass
PWM controller power supply pin. Internally generated.
Requires a 2.2µf external bypass capacitor
8
SS
Soft start pin. External capacitor provides soft start. Pulling soft start pin low
will disable the output. Cannot be cycled to unlatch OVP trip
9 CC
Output of the error amplifier
10 FB
Inverting input of the error amplifier
11 FBs
Output overvoltage sense pin.
12
RT
Switching frequency setting pin. For RT selection, refer to Fig.9 of the
datasheet
13
PGOOD
Power Good pin. Open collector, requires external pulll-up. If function not
needed, pin can be left floating
14
VREF
Non inverting input of the error amplifier (reference Voltage pin). Connect a
100pF cap from this pin to PGND.
15
SYNC
External Clock synchronization pin. Set free running frequency to 80% of
the SYNC frequency. When not in use, leave pin floating
16 OCSET
Output overcurrent trip threshold pin
18,19
22
24
VSW
VSWs
VINs
Output inductor connection pins
Test pad, for internal use, short to VSW
Test pad, for internal use, short to VIN
04/08/05




IP1203 pdf, 반도체, 판매, 대치품
iP1203
www.datasheet4u.com
Fig. 1: iP1203 Internal Block Diagram
4 www.irf.com

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IP1203 전자부품, 판매, 대치품
iP1203
Applying the Safe Operating Area (SOA) Curve
www.datasheet4u.com
The SOA graph incorporates power loss and thermal resistance information in a way that allows one to solve for maximum
current capability in a simplified graphical manner. It incorporates the ability to solve thermal problems where heat is drawn
out through the printed circuit board and the top of the case.
0 10 20 30 40 50 60 70 80 90 100 110 120
Procedure
Case Temperature (ºC)
16
14
1) Draw a line from Case Temp axis at TCASE to the PCB
12
Temp axis at TPCB.
2) Draw a vertical line from the TX axis intercept to the SOA 10
curve. (see AN-1047 for further explanation of TX )
8
3) Draw a horizontal line from the intersection of the vertical 6
1
3
2
TX
line with the SOA curve to the Y axis. The point at which
VIN = 12V
4 VOUT = 1.5V
iP1203 SOA
the horizontal line meets the y-axis is the SOA current.
fSW = 300kHz
2 L=1.0uH
4) If no top sided heatsinking is available, assume TCASE
temperature of 125°C for worst case performance.
0
0 10 20 30 40 50 60 70 80 90 100 110 120
PCB Temperature (ºC)
Adjusting the Power Loss and SOA Curves for Different Operating Conditions
To make adjustments to the power loss curves in Fig. 2, multiply the normalized value obtained from the curves in Figs. 4,
5, 6 or 7 by the value indicated on the power loss curve in Fig. 2. Then if multiple adjustments are required, multiply all of the
normalized values together, then multiply that product by the value indicated on the power loss curve in Fig. 2. The resulting
product is the final power loss based on all factors. See example no. 1.
To make adjustments to the SOA curve in Fig. 3, determine your maximum PCB Temp & Case Temp at the maximum
operating current of each iP1203. Then, add the correction temperature from the normalized curves in Figs. 4, 5, 6 or 7 to
the TX axis intercept (see procedure no. 2 above) in Fig. 3. When multiple adjustments are required, add all of the temperatures
together, then add the sum to the TX axis intercept in Fig. 3. See example no. 2.
Operating Conditions for the following examples:
Output Current = 12A
Output Voltage = 1.2V
Input Voltage = 13.2V
Sw Freq= 400kHz
Inductor = 0.6µH
Example 1) Adjusting for Maximum Power Loss:
(Fig. 2) Maximum power loss = 4.1W
(Fig. 4) Normalized power loss for input voltage 1.025
(Fig. 5) Normalized power loss for output voltage 0.97
(Fig. 6) Normalized power loss for frequency 1.08
(Fig. 7) Normalized power loss for inductor value 1.08
Adjusted Power Loss = 4.1 x 1.025 x 0.97 x 1.08 x 1.08 4.75W
www.irf.com
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