參數(shù)資料
型號: AOZ1210
廠商: ALPHA
英文描述: EZBuck⑩ 2A Simple Buck Regulator
中文描述: EZBuck⑩甲簡單降壓穩(wěn)壓器
文件頁數(shù): 11/14頁
文件大?。?/td> 583K
代理商: AOZ1210
AOZ1210
Rev. 1.3 December 2007
www.aosmd.com
Page 11 of 14
AOZ1210/2
3 GND
2 BST
1 LX
4 FB
6 EN
7 Vin
8 VBIAS
C
5 COMP
Vo
C2
C
2
R
R
Rc
Cc
VIN
L1
C
C
dissipation of converter circuit can be measured by input
power minus output power.
The power dissipation of inductor can be approximately
calculated by output current and DCR of the inductor.
The power dissipation of the diode is:
The actual AOZ1210 junction temperature can be
calculated with power dissipation in the AOZ1210 and
thermal impedance from junction to ambient.
The maximum junction temperature of AOZ1210 is
145°C, which limits the maximum load current capability.
The thermal performance of the AOZ1210 is strongly
affected by the PCB layout. Care should be taken by
users during design process to ensure that the IC will
operate under the recommended environmental
conditions.
Several layout tips are listed below for the best electric
and thermal performance. Figure 3 is a layout example.
1.
Do not use thermal relief connection to the V
IN
and
the GND pin. Pour a maximized copper area to the
GND pin and the V
IN
pin to help thermal dissipation.
Input capacitor should be connected as close as
possible to the V
IN
and GND pins.
Make the current trace from LX pins to L to C
O
to
GND as short as possible.
2.
3.
4.
Pour copper plane on all unused board area and
connect it to stable DC nodes, like V
IN
, GND or V
OUT
.
Keep sensitive signal traces such as the trace
connecting FB and COMP pins away from the
LX pins.
5.
P
total_loss
V
IN
I
IN
V
O
I
O
×
×
=
P
inductor_loss
I
O
2
R
inductor
1.1
×
×
=
P
diode_loss
I
O
V
F
1
V
V
IN
----------
×
×
=
T
junction
P
total_loss
P
inductor_loss
T
ambient
+
(
)
Θ
×
JA
=
+
Figure 3. Layout Example of the AOZ1210
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