July 2004
1/13
s
Current-mode PWM Controller
s
High-current output drive suitable for
Power MOSFET
s
Automatic burst mode in zero-load
condition
s
Primary overcurrent protection
(hiccup mode)
s
Internal leading edge blanking on current
sense
s
External slope compensation capability
s
Programmable soft start
s
Frequency modulation for low emi
s
Accurate oscillator frequency
s
77% duty cycle limitation
s
5V reference
s
Under voltage protection
s
Thermal shutdown at 130C
s
2kV ESD protection
DESCRIPTION
The TSM006 integrated circuits incorporate 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, these devices include additional
features for higher integration.
APPLICATION
s
AC/DC adapter
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS (top view)
ORDER CODES
D
SO-14
(Plastic MicroPackage)
2
1
2
3
4
5
6
7
Rt/Ct
Fm
Cs
Ss
Comp
Bs
Bl
Dis
Rex
Vref
Vin
Out
Pgnd
Cslope
8
9
10
11
12
13
14
Part Number
Temperature Range
Package
Packaging
Marking
TSM006ID
0, +105C
SO
Tube
TSM006
TSM006IDT
Tape & Reel
TSM006
TSM006
Primary PWM Controller
Revision 1
TSM006
Block Diagram
2/13
1 Block Diagram
PIN DESCRIPTION
Pgnd
Vin
Out
Comp
Ss
Rt/Ct
Vref
Cs
Vin
Vref_Status
Standby
REX
Rb
Frequency mod.
0.5V
Rex
BS
Vref
Fm
DIS
UVLO
Cref
Icomp
600A
Thermal
Shutdown
Ct
R
S
Q
!Q
Cs_Latch
R
S
Q
!Q
Start up_Latch
Css
Comp_Hiccup
28V
Current source
Disable_Latch
Hiccup_Latch
Burst_Latch
LEB
Comp Clamp = Vss
Slop_Compensation
Soft start
Comp_Osc
Iiss
10A
Idss1
1A
Idss2
1mA
Vref
R
2R
Comp_Cs
1V
Cfm
BL
Cslope
14
4
6
3
8
2
1
5
12
7
11
10
9
13
Rt
Vref
Idct1
300A
Name
SO14
Type
Function
RT/CT
1
Timing capacitor
Sets the oscillator frequency and maximum duty cycle
FM
2
Analog input
Frequency modulation
CS
3
Analog input
Current sense.
BL
4
Analog output
Burst level
SS
5
Timing capacitor
Soft start and hiccup timing, latched disable input.
COMP
6
Analog input
Current comparator for current mode control.
BS
7
Output input
Burst mode status
CSLOPE
8
Analog output
Slope compensation
PGND
9
Power supply
Power ground
OUT
10
Analog output
Totem pole output to direct drive a power MOSFET.
VIN
11
Power supply
Supply input voltage.
VREF
12
Analog output
+5V Voltage reference
REX
13
Analog input
External resistor for internal constant current
DIS
14
Analog input
Latched disable
Absolute Maximum Ratings
TSM006
3/13
2 Absolute Maximum Ratings
OPERATING CONDITIONS
Symbol
DC Supply Voltage
Value
Unit
Vin
DC Supply Voltage (Iin<50mA)
1
1)
All voltage values, except differential voltage are with respect to network ground terminal (GND).
-0.3 to self limit
V
Io
DC output current
0.1
A
Iopeak
Peak output current
1
A
Vcomp
COMP terminal voltage
-0.3 to 6.5
V
Isinkcomp COMP terminal sink current
6
mA
Vss
SS terminal voltage
-0.3 to 8
V
Vout
OUT terminal voltage
-0.3 to Vin
V
Vter
Other terminal voltage (CT, VREF, BS, BL, CSLOPE REX, CS,
FM, DIS)
-0.3 to Vref
V
Pt
Power dissipation at 25C
500
mW
Tstg
Storage temperature
-40 to 150
C
Tj
Junction temperature
150
C
ESD
Electrostatic Discharge
2
kV
Symbol
Parameter
Value
Unit
Vcc
DC Supply Conditions
8 to 20
V
Toper
Operating Free Air Temperature Range
0 to 105
C
TSM006
Electrical Characteristics
4/13
3 Electrical
Characteristics
Tamb = 25C, Vin=15V, Rt=39k, Ct=470pF, Rex=27k, Cfm=1nF unless otherwise specified
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
Main oscillator
Fosco
FoscL
Lower oscillating frequency
Upper oscillating frequency
8
Vin
20V, 0
Ta
105C
Vfm=GND
Vfm=Vref
63
57.6
68
62
73
66.4
kHz
kHz
Fjit
Frequency jitter
Fjit=Fosco - FoscL
6
7
8
kHz
Ffm
Frequency modulation
4.5
kHz
Vthct
Upper trip point
Vfm=GND
3.0
V
Vtlct
Lower trip point
Vfm=GND
1.4
V
Vct
Amplitude
Vfm=GND
1.6
V
Idct1
Discharge current
Vct=2V
300
A
Idct2
Current at Ct in UVLO
Vct=1V
1
3
mA
Disable
Vdis
Voltage threshold
2.5
2.65
2.8
V
Vref reference pin
Vref
Voltage reference
4.91
5.00
5.09
V
Vline
Line regulation
12V
Vin
20V 5
10
mV
Vload
Load regulation
1mA
Iref
5mA
10
20
mV
Vtotal
Total variation
Line, load, temp
4.85
5.00
5.15
V
Ios
Short circuit current
Vref=0
10
mA
Slope Compensation
IsinkCP
Sink current
Vct=2.2V, VCslope=1V
90
A
IsrcCP
Source current
Vct=2.2V, VCslope=0V
2
mA
Comp
Icomp
Source current
Vcomp=5V
0.5
0.6
0.7
mA
Current sense
Avcs
Gain
0V
Vcs
0.8V 2.85
3.00
3.15
Vz1
Maximum sensing voltage
Vcomp=5V
0.9
1.0
1.1
V
PSRR
Power supply voltage rejection ratio
8V
Vin
20V
70
dB
Leading edge blanking
LEB
Delay to output
Vcs = 0 to 2 V
Vcomp = 2 V
280
ns
Output
VOL1
Output low voltage 1
Iosink=20mA
1.0
V
VOL2
Output low voltage 2
Iosink=200mA
0.8
2.2
V
VOH1
Output high voltage 1
Iosource=20mA
Vin-2.0
V
VOH2
Output high voltage 2
Iosource=200mA
Vin-3.0
V
tr
Rise time
CL=1nF, 10% to 90%
70
100
ns
tf
Fall time
CL=1nF, 90% to 10%
40
60
ns
VOL3
UVLO saturation
Vin=5V, Iosink=1mA
0.5
V
Fout
Output frequency
Option 1
Fosc
kHz
DCmax
Maximum Duty Cycle
Option 1
77.5
%
Electrical Characteristics
TSM006
5/13
Soft start
Iiss
Charge current
Vss=2V
8
10
12
A
dIiss
Temperature stability
0C
Ta
105C
7
10
13
A
Idss1
Discharge current (hiccup)
Vss=2V, Vcs=2V
1
1.2
A
Idss2
Sink current (uvlo)
Vss=2V, Vin=7V
3
mA
Iiss/Idss1
Charge/discharge ratio
10
11
VHss
Clamp voltage
4
V
VLss
Low voltage (uvlo)
Vin=7V, Idss=1mA
0.5
V
Under Voltage Lockout (UVLO)
VH
UVLO top threshold
11.5
12
12.5
V
VL
UVLO bottom threshold
8.0
8.4
8.8
V
Supply current
Iin
Operating current
CL=1nF
4.5
5.0
mA
Iidle
Supply current in idle mode
Vcomp=1V
3.3
3.8
mA
Istby
Supply current in standby mode
Vin<VH
40
60
A
Vclamp
Clamp voltage
Iin=50mA
22
25
30
V
Burst
Vbsol
Output low voltage
Iobs=1mA
0.3
V
Iohbs
Leakage current
Vbs=5V
2
A
Vbl1
Threshold level on Comp to enter
Burst mode
BL pin left unconnected
1.25
V
Vbl1hyst
Vbl1 Hysteresis
0.3
V
Vbl2
Threshold level on Comp to exit
burst mode
1.75
V
Hiccup
Vz2
Threshold level on Cs to enter Hic-
cup mode
1.15
1.25
1.35
V
Vhicc
Threshold level on Ss to exit Hiccup
mode
0.5
V
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
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