ZXLD1371QESTTC Diodes Inc. / Zetex, ZXLD1371QESTTC Datasheet - Page 30

• Manufacturer Part Number: ZXLD1371QESTTC
• Description: MOSFET LED Controller TSSOP TSSOP-16EP T&R 2.5K
• Manufacturer: Diodes Inc. / Zetex

Specifications of ZXLD1371QESTTC

• Rohs: yes

Or in case of separate voltage supply, with V
ZXLD1371
Document number: DS35436 Rev. 1 - 2
Applications Information
Example 2)
ZXLD1371 I
Assuming that cumulatively the rise time and fall time can account for a maximum of 10% of the period, the maximum
frequency allowed in this condition is:
This frequency is within the recommended frequency range the device can handle, therefore the ZXMN6A09K is
recommended to be used with the ZXLD1371 for frequencies from 300kHz to 500kHz).
The recommended total gate charge for the MOSFET used in conjunction with the ZXLD1371 is less than 30nC.
Junction Temperature Estimation
Finally, the ZXLD1371 junction temperature can be estimated using the following equations:
Total supply current of ZXLD1371:
Power consumed by ZXLD1371
Where the total quiescent current I
discharge the gate of the power MOSFET. Moreover the part of thermal resistance between case and ambient depends on
the PCB characteristics.
Using the ZXMN6A09K (V
Q
G
t
I
Where I
P
P
T
dt
PERIOD
QTOT
= 29nC at V
J
IC
IC
=
=
= V
= V
PEAK
I
≈ I
PEAK
IN
IN
Q
= 20*dt
Q
Q
T
T
= 300mA
g
• (I
• I
= total quiescent current I
A
A
+ f • Q
Q-IN
+ P
+ P
Q
GS
=
+ f • Qg)
IC
IC
300
+ V
= 10V
29
G
• θ
• (θ
DS(MAX)
nC
mA
aux
JA
JC
• (I
=
=
+ θ
Q-AUX
97
Figure 8. Power derating curve for ZXLD1370
= 60V, I
f = 1/ t
CA)
mounted on test board according to JESD51
QTOT
(cont.)
ns
2.5
1.5
0.5
2
1
0
-40 -25 -10
+ f • Qg)
PERIOD
consists of the static supply current (I
D(MAX)
AUX
Q-IN
< 15V
+ I
= 515kHz
AMBIENT TEMPERATURE (°C)
= 12.2A):
Q-AUX
5
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20 35 50 65 80 95 110 125
30 of 42
Q
) and the current required to charge and
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February 2012
ZXLD1371