參數(shù)資料
型號： TSM111CDT
英文描述： Analog IC
中文描述： 模擬IC
文件頁數(shù)： 14/17頁
文件大?。?/td> 148K
代理商： TSM111CDT
TSM111
14/17
When the system has latched (either after over-
current or overvoltage condition), the system
needs to be reset via the Remote input. The C2
capacitor determines two different timings to the
Fault output :
C2=100nF => Trem1(ON to OFF)=8ms
C2=100nF => Trem2(OFF to ON)=24ms
R5 is a pull down resistor on the remote pin of
TSM111. Notethat an integrated pull up resistor of
100k
is to be taken into account in the choice of
R5, knowing that the threshold voltage of the input
comparator is 1.4V. Therefore, R5 should be low-
er than 38.8k
.
R5 = 1k
is a good value.
The evaluation board integrates the possibility to
make the Remote signal either manual, or elec-
tronic thanks to the ORing diodes D5 and D6 (and
the pull down resistor R5), and the Push Button
(SW1). These diodes can of course be replaced
by straps according to the evaluation require-
ments (manual or electronic).
The Tpor delay time allows the PG output (Power
Good) to rise to high level when the 5V power line
internal supervision circuitry has stayed above the
undervoltage 4.3V threshold for more than Tpor
time following the approximated equation 6 :
C3 x Vth = Ic x Tpor
where Vth is 2V and Ic is 20
μ
A.
C3=2.2
μ
F => Tpor=300ms
When the 5V power line passes under the 4.3V
undervoltage threshold, the Power Good signal
(PG) falls immediately to low level.
The Power Good output can also be triggered by
the Vdet input of the board. This input should be
connected to a power line representative of the
AC mains power situation. As an example, an ad-
ditional winding onthe auxiliary power supply offer
an early warning of power down from the mains
power point of view. The UV threshold is internally
fixed to Vdet=1.26V. Therefore, it is necessary to
add a zener diode D1.
D1=15Vzener => Vdet=16.26V
Note that a 20k
serial pull down resistor is inte-
grated. Therefore, only a low powerzener is need-
ed.
The Fault output needs a pull up resistor R6.
The Power Good output needs a pull up resistor
R11. Both signals are pulled up to the 5Vstandby
power supply which can be generated from the
evaluation board thanks to a 78L05 5V regulator.
This regulator needs a C6 bypass capacitor.
eq6
The C7 bypass capacitor smoothens the VCC pin
of TSM111.
The Adj (Adjust) pin should be connected to
ground. Adjust allows to tune a new overvoltage
protection value (ex 2.7V instead of 3.3V).
Example of component lists
Table 1 gives an example of component list
Name
Type
Value
Comment
U1
IC
TSM111
DIP20
U2
IC
78L05
TO92
R1
R 1/4W
R 1/2W
R 1W
10m
5m
2.5m
5A
10A
20A
R2
R 1/4W
R 1/2W
R 1W
10m
5m
2.5m
5A
10A
20A
R3
R 1/4W
R 1/2W
R 1W
65m
13m
6.5m
1A
5A
10A
R4
R 1/4W
33K
R5
R 1/4W
1K
R6
R 1/4W
47K
R7
R 1/4W
depends on opto used
R8
R 1/4W
10k
comp. network to
be fine tuned
R9
R 1/4W
depends on opto used
R10
R 1/4W
10k
comp. network to
be fine tuned
R11
R 1/4W
47K
D1
Z 1/4W
15V
D5
D 1/4W
1N4148
D6
D 1/4W
1N4148
C1
C Electro
4.7
μ
F
C2
C Plastic
100nF
C3
C Electro
2.2
μ
F
C4
C Plastic
10NF comp. network to
be fine tuned
C5
C Plastic
10NF comp. network to
be fine tuned
C6
C Plastic
100nF
C7
C Electro
10
μ
F
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TSM-112-01-F-DH 制造商:Samtec Inc 功能描述:.025 SQ. TERMINAL STRIPS - Bulk
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