TSM007
Primary PWM Controller
s
s
s
s
s
s
Current-mode PWM Controller
Internal Under Voltage Protection
Programmable Under Voltage
High-current Output Drive Suitable for
Power Mosfet
Programmable Soft Start
2kV ESD Protection
DESCRIPTION
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.
N
DIP-8
(Plastic Package)
D
SO-8
(Plastic Package)
PIN CONNECTIONS
(top view)
1 Comp
APPLICATION
s
PC SMPS
ORDER CODE
Part Number
TSM007IN
TSM007ID
TSM007IDT
Temperature Range
O
so
b
te
le
ro
P
uc
d
0, +95°C
s)
t(
so
b
-O
P
te
le
3 CS
4 CT
2 Brnout
od
r
Ss
Vin
Out
s)
t(
uc
8
7
6
Gnd 5
Package
DIP
SO
SO
Packaging
Tube
Tube
Tape & Reel
June 2004
1/12
TSM007
1
Block Diagram
Block Diagram
Vin
50µA
Internal UVLO
Standby
Vref
2 Brnout
Vin
Brown_Out
Vref_Status
725µA
28V
2R
1V
R
Comp_Cs
Cs_Latch
1 Comp
R
S
Q
!Q
3 CS
Vref
LEB
400µA
Start up_Latch
R
S
Q
!Q
4 CT
CT
Comp_Osc
1mA
Vref
10µA
8 SS
Css
4mA
Soft start
PIN DESCRIPTION
O
COMP
BRNOUT
CS
CT
GND
OUT
VIN
SS
so
b
te
le
ro
P
1
2
3
4
5
6
7
8
uc
d
Type
s)
t(
so
b
-O
te
le
r
P
od
s)
t(
uc
Vin 7
Out 6
Gnd 5
Name
Pin
Function
Current comparator for current mode control.
Undervoltage.
Current sense.
Sets the oscillator frequency.
Signal ground.
Totem pole output to direct drive a power MOSFET.
Supply input voltage.
Soft start.
Analog input
Analog input
Analog input
Timing capacitor
Power supply
Analog output
Power supply
Timing capacitor
2/12
Absolute Maximum Ratings
2
Absolute Maximum Ratings
Symbol
Vin
Io
Iopeak
Vcomp
Isinkcomp
VBrnout
Vcs
Vct
Vout
Vss
Pt
Tstg
Tj
ESD
DC Supply Voltage
DC Supply Voltage
1
DC output current
Peak output current
COMP terminal voltage
COMP terminal sink current
Brown out terminal voltage
CS terminal voltage
CT terminal voltage
OUT terminal voltage
SS terminal voltage
Power dissipation at 25°C
Storage temperature
Junction temperature
Electrostatic Discharge
Value
-0.3 to 25
0.1
1
-0.3 to 5.5
6
-0.3 to Vin
-0.3 to 6.3
-0.3 to 5.0
-0.3 to Vin
-0.3 to 6.4
500
-40 to 150
150
2
TSM007
Unit
V
A
A
V
mA
V
V
V
V
V
mW
°C
°C
kV
1) All voltage values, except differential voltage are with respect to network ground terminal (GND).
OPERATING CONDITIONS
Symbol
Vcc
Toper
Parameter
DC Supply Conditions
Operating Free Air Temperature Range
O
so
b
te
le
ro
P
uc
d
s)
t(
so
b
-O
te
le
r
P
12 to 25
0 to 95
od
Value
s)
t(
uc
Unit
V
°C
3/12
TSM007
3
Electrical Characteristics
Symbol
Oscillator
Fosc
Foscmax
∆
fosc1
∆
fosc2
Ici
Icd
Vthct
Vtlct
∆
Vct
Brown out
Vbr
Ibr-on
Vbrin
Comp
Icomp
Avcs
Vthcs
PSRR
Ibcs
Source surrent
Gain
Maximum sensing voltage
Power supply voltage rejection ratio
Input bias current
Vcomp=5V
0V
≤
Vcs
≤
0.8V
Vcomp=5V
12V
≤
Vin
≤
25V
Vcs=2V
Threshold voltage
Brown out terminal source current
Input voltage
Vbr=3V, 0°C
≤
T
≤
70°C
Oscillating frequency
Maximum oscillating frequency
Typical oscillating voltage stability
Typical oscillating temperature stability
Charge current
Discharge current
Upper trip point
Lower trip point
Amplitude
Parameter
Test Condition
Electrical Characteristics
Tamb = 25°C, Vin=12V, Ct=1.5nF unless otherwise specified
Min
Typ
Max
Unit
84
500
12V
≤
Vin
≤
25V
0°C
≤
Ta
≤
70°C
Vct=2V
Vct=2V
100
116
336
504
±
0.5
±
10
400
600
3.0
1.4
1.6
2.50
50
±
2.0
464
696
kHz
kHz
%
%
µ
A
µ
A
V
V
V
V
µ
A
V
2.42
42
-0.3
0.5
2.85
0.9
Current sense
Leading edge blanking
LEB
Output
VOL1
VOL2
VOH1
VOH2
tr
tf
VOL3
Dmax
Soft start
Output low voltage 1
Output low voltage 2
Output high voltage 1
Output high voltage 2
Rise time
Fall time
UVLO saturation
Maximum duty cycle
Delay to output
O
so
b
Iiss
dIiss
Idss
VHss
VLss
VH
VL
dVuvlo
Iin
Istby
te
le
ro
P
uc
d
s)
t(
so
b
-O
P
te
le
od
r
3.00
1.0
70
0.5
280
0.725
s)
t(
uc
0.950
3.15
1.1
10
2.58
58
Vin
µA
V
dB
µ
A
Vcs = 0 to 1 V
Vcomp = 2 V
ns
Iosink=20mA
Iosink=200mA
Iosource=20mA
Iosource=200mA
CL=1nF, 10% to 90%
CL=1nF, 90% to 10%
Vin=5V, Iosink=1mA
0.1
0.8
Vin-2.0 Vin-1.5
Vin-3.0 Vin-1.7
100
30
0.05
54
60
8
7
4
4.2
10
10
1.5
2.2
150
60
1.1
66
12
13
V
V
V
V
ns
ns
V
%
Source current
Temperature stability
Sink current
Clamp voltage
Low voltage
UVLO top threshold
UVLO bottom threshold
UVLO hysteresis voltage
Operating current
Supply current in standby mode
Vss=2V
0°C
≤
Ta
≤
70°C
Vss=2V, Vbr=2V
Vbr=2V
0.2
8.9
7.3
9.5
7.9
1.6
10
250
10.1
8.5
µ
A
µ
A
mA
V
V
V
V
V
mA
µ
A
Internal Under Voltage Lockout (UVLO)
dVuvlo=VH-VL
CL=3.3nF, Vin=12V
Vbr
≤
1V, Vin=12V
Total current consumption
13
350
4/12
Functional Description
4
Functional Description
Vref 1.4V_3.0V
TSM007
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.
CT
Comp_osc
400µA
Vin
CT
725µA
1mA
Cs Latch
Comp
VF
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.
S
R
!Q
Q
VF
CS
Comp_Cs
2R
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.
Vcc
R
1V
UVLO
Out
Vref_Status
Vref
Vref 1.4V_3.0V
Comp_osc
400µA
Oscillator
CT
Startup Latch
CT
1mA
S
R
!Q
Q
Out
Current sense input
bs
O
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.
T = Tc+Td
et
l
o
P
e
ro
uc
d
Out
s)
t(
so
b
-O
A capacitor from the CT pin to GND sets the
oscillating frequency.
VCT
3V
Ici=400µA
1.4V
Icd=600µA
P
te
le
od
r
Out
s)
t(
uc
Tc
Td
Vref
400µA
CT
Ici
1mA
CT
CT
CT
Icd
Vref
400µA
1mA
T = CT∆Vct/Ici + CT∆Vct/Icd
Let’s assume F = 1/T =100KHz
==> CT = (IcixIcd) / (Fx∆Vct(Ici+Icd))
==> CT = 1.5nF
5/12
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