AO4914(2011) Просмотр технического описания (PDF) - Alpha and Omega Semiconductor
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AO4914 Datasheet PDF : 9 Pages
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AO4914
Thermal Characteristics - MOSFET
Parameter
Maximum Junction-to-Ambient A
Maximum Junction-to-Ambient A D
Maximum Junction-to-Lead
Symbol
t ≤ 10s
Steady-State
RθJA
Steady-State RθJL
Typ
48
74
32
Max
62.5
90
40
Units
°C/W
°C/W
°C/W
Thermal Characteristics - Schottky
Parameter
Symbol
Typ
Max
Maximum Junction-to-Ambient A
Maximum Junction-to-Ambient A D
t ≤ 10s
RθJA
48
Steady-State
74
62.5
90
Maximum Junction-to-Lead
Steady-State RθJL
32
40
A. The value of RθJA is measured with the device mounted on 1in2 FR-4 board with 2oz. Copper, in a still air environment with TA =25°C. The
value in any given application depends on the user's specific board design.
B. The power dissipation PD is based on TJ(MAX)=150°C, using ≤ 10s junction-to-ambient thermal resistance.
C. Repetitive rating, pulse width limited by junction temperature TJ(MAX)=150°C. Ratings are based on low frequency and duty cycles to keep
initialTJ=25°C.
D. The RθJA is the sum of the thermal impedence from junction to lead RθJL and lead to ambient.
E. The static characteristics in Figures 1 to 6 are obtained using <300µs pulses, duty cycle 0.5% max.
F. These curves are based on the junction-to-ambient thermal impedence which is measured with the device mounted on 1in2 FR-4 board with
2oz. Copper, assuming a maximum junction temperature of TJ(MAX)=150°C. The SOA curve provides a single pulse rating.
Units
°C/W
°C/W
°C/W
THIS PRODUCT HAS BEEN DESIGNED AND QUALIFIED FOR THE CONSUMER MARKET. APPLICATIONS OR USES AS CRITICAL
COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS ARE NOT AUTHORIZED. AOS DOES NOT ASSUME ANY LIABILITY ARISING
OUT OF SUCH APPLICATIONS OR USES OF ITS PRODUCTS. AOS RESERVES THE RIGHT TO IMPROVE PRODUCT DESIGN,
FUNCTIONS AND RELIABILITY WITHOUT NOTICE.
Rev 11: Mar. 2011
www.aosmd.com
Page 2 of 9
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