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參數資料
| 型號： | TSM007IN |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁數： | 10/12頁 |
| 文件大小： | 182K |
| 代理商： | TSM007IN |
Functional Description
TSM007
7/12
COMP input
This pin is connected to the current comparator
for current mode control. The pin should be
connected to the collector (primary side) of an
optocoupler which anode (secondary side) is
driven by the output of error amplifier.
The COMP input is used to set the reference level
for the current sense comparator. The current
sense threshold is set to (Vcomp - 2 * Vbe ) / 3.
Standby consumption
The low current value supply in stand by mode
reduces the consumption ..
When Brnout is below 2.5V, Vflitered below 200V
the PWM is off.
==> Icc = Istby.
RP = (Vfiltered-Vz)/Istby
In normal mode, the Vfiltered voltage can go up to
400V.
==> Rpmax dissipation = (Vfiltered-Vin)/Rp
The Iin current is provided by the auxiliary
winding.
Let’s assume Vfiltered = 200V
Rp = 620K
Rpmax dissipation = 220mW
Output driver
The OUT totem pole output is capable to sink and
source more than 1.0A (peak) in order to direct
drive a power MOSFET..
Rp
R1
R2
VFiltered
D1
Raux
+
Cd
Brnout
2.5V
Out
Istby
Iin
Istby
1
2
3
4
5
6
7
8
Brnout
Vin
Out
CS
Comp
Ss
CT
Gnd
TSM007
Gnd
Vin
Out
Rb
28V
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