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PDF TSM007 Data sheet ( Hoja de datos )
| Número de pieza | TSM007 | |
| Descripción | Primary PWM Controller | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TSM007 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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TSM007
Primary PWM Controller
s Current-mode PWM Controller
s Internal Under Voltage Protection
s Programmable Under Voltage
s High-current Output Drive Suitable for
Power Mosfet
s Programmable Soft Start
s 2kV ESD Protection
DESCRIPTION
N
DIP-8
(Plastic Package)
D
SO-8
(Plastic Package)
The TSM007 integrated circuit incorporates all
circuitry to implement off line or DC-DC power
supply applications using a fixed frequency
current mode control.
Based on a standard current mode PWM
controller, this device includes additional features
for higher integration.
PIN CONNECTIONS (top view)
1 Comp
2 Brnout
3 CS
Ss 8
Vin 7
Out 6
APPLICATION
s PC SMPS
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4 CT
Gnd 5
DataShee
ORDER CODE
Part Number
TSM007IN
TSM007ID
TSM007IDT
Temperature Range
0, +95°C
Package
DIP
SO
SO
Packaging
Tube
Tube
Tape & Reel
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June 2004
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Functional Description
TSM007
4 Functional Description
TSM007: PWM Controller IC
Internal UVLO function
The Under Voltage Lock Out function disables the
whole device when supply voltage is lower than
the threshold.
Vref block
The Vref block provides an internal 5V reference
voltage to the IC. An internal Vref status signal is
active when Vref is lower than 4.7V and is used to
drive the output driver low when Vref is not valid.
Startup latch
The startup latch is set when the IC exits from
standby mode or UVLO state. It is reset when the
CT capacitor is discharged for the first time.
Vref 1.4V_3.0V
Comp_osc
400µA
CT
Vin
CT
725µA
1mA
Comp
VF
VF
Cs Latch
S !Q
RQ
CS
2R
Comp_Cs
R 1V
Vcc UVLO
Out Out
Vref_Status
et4U.com
Vref
Vref 1.4V_3.0V
Comp_osc
400µA
Oscillator
DataSheet4UA.ccoampacitor from the CT pin to GND sets tDheataShee
oscillating frequency.
CT
CT
1mA
Startup Latch
S !Q
RQ
VCT
Ici=400µA
3V
1.4V
Icd=600µA
Out Out
Current sense input
A voltage proportional to the transformer primary
winding current is applied to the CS pin. The
control IC uses this information to perform current
mode control. The PWM function will be stopped if
the CS pin voltage is greater than 1.0V.
Tc
Vref
400µA
CT
Ici
1mA
CT
Td
Vref
400µA
CT
Icd
1mA
CT
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T = Tc+Td
T = CT∆Vct/Ici + CT∆Vct/Icd
Let’s assume F = 1/T =100KHz
==> CT = (IcixIcd) / (Fx∆Vct(Ici+Icd))
==> CT = 1.5nF
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Package Mechanical Data
5 Package Mechanical Data
et4U.com
Plastic DIP-8 MECHANICAL DATA
DIM.
A
a1
B
B1
b
b1
D
E
e
e3
e4
F
I
L
Z
MIN.
0.7
1.39
0.91
0.38
0.44
mm.
TYP
3.3
MAX.
1.65
1.04
0.5
0.5
9.8
8.8
2.54
7.62
7.62
7.1
4.8
3.3
DataSheet14.6U.com
MIN.
0.028
0.055
0.036
0.015
0.017
inch
TYP.
0.130
0.020
0.346
0.100
0.300
0.300
0.130
TSM007
MAX.
0.065
0.041
0.020
0.386
0.280
0.189
0.063
DataShee
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P001F
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11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet TSM007.PDF ] | |
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