Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- DESCRIPTION
- ENVIRONMENTAL AND ABSOLUTE MAXIMUM RATINGS
- ELECTRICAL CHARACTERISTICS
- ELECTRICAL CHARACTERISTICS
- TYPICAL CHARACTERISTICSThe electrical characteristic data has been developed from actual products tested at 25C. This data is considered typical for the converter. Applies to , , and .The temperature derating curves represent the conditions at which internal components are at or below the manufacturer's maximum operating temperatures. Derating limits apply to modules soldered directly to a 100 mm x 100 mm double-sided PCB with 2 oz. copper. For surface mount packages (AS and AZ suffix), multiple vias must be utilized. Please refer to the mechanical specification for more information. Applies to .
- TYPICAL CHARACTERISTICSThe electrical characteristic data has been developed from actual products tested at 25C. This data is considered typical for the converter. Applies to , , and .The temperature derating curves represent the conditions at which internal components are at or below the manufacturer's maximum operating temperatures. Derating limits apply to modules soldered directly to a 100 mm x 100 mm double-sided PCB with 2 oz. copper. For surface mount packages (AS and AZ suffix), multiple vias must be utilized. Please refer to the mechanical specification for more information. Applies to .
- APPLICATION INFORMATION
- ADJUSTING THE OUTPUT VOLTAGE
- CAPACITOR RECOMMENDATIONS FOR THE PTH04T240/241W POWER MODULE
- TurboTrans Technology
- TurboTrans Selection
- UNDERVOLTAGE LOCKOUT (UVLO)
- Soft-Start Power Up
- On/Off Inhibit
- Smart Sync
- Overcurrent Protection
- Overtemperature Protection (OTP)
- Differential Output Voltage Remote Sense
- Auto-Track Function
- Tape & Reel and Tray Drawings
PTH04T240W Type B Capacitors
9
8
20
10
30
7
6
5
4
3
6000
5000
4000
3000
2000
1000
500
300
200
10000
400
700
600
800
900
7000
8000
9000
C − Capacitance − µF
Transient − mV/A
Without TurboTrans
With TurboTrans
C − Capacitance − µF
Transient − mV/A
9
8
20
10
30
7
6
5
4
3
6000
5000
4000
3000
2000
1000
500
300
200
10000
400
700
600
800
900
7000
8000
9000
Without TurboTrans
With TurboTrans
R
TT
+
40
ƪ
1 *
ǒ
C
O
ń1100
Ǔƫ
ƪ
ǒ
C
O
ń220
Ǔ
* 1
ƫ
(
kW
)
(3)
PTH04T240W , PTH04T241W
SLTS276D – OCTOBER 2006 – REVISED JULY 2009 ......................................................................................................................................................
www.ti.com
5-V Input 3.3-V Input
Figure 12. Capacitor Type B, Figure 13. Capacitor Type B,
1000 < C( µ F) × ESR(m Ω ) ≤ 5000 1000 < C( µ F) × ESR(m Ω ) ≤ 5000
(e.g. Polymer-Tantalum) (e.g. Polymer-Tantalum)
Table 5. Type B TurboTrans C
O
Values and Required R
TT
Selection Table
Transient Voltage Deviation (mV) 5-V Input 3.3-V Input
25% load step 50% load step 75% load step C
O
R
TT
C
O
R
TT
(2.5 A) (5 A) (7.5 A) Minimum Required Minimum Required
Required Output TurboTrans Required Output TurboTrans
Capacitance ( µ F) Resistor (k Ω ) Capacitance ( µ F) Resistor (k Ω )
70 140 210 220 open 220 open
60 120 180 240 464 270 158
50 100 150 300 80.6 330 56.2
40 80 120 410 30.1 450 24.3
30 60 90 600 10.7 620 9.53
25 50 75 760 4.99 780 4.64
20 40 60 1050 0.75 1050 0.75
15 30 45 2400 short 2250 short
10 20 30 10000 short 7900 short
R
TT
Resistor Selection
The TurboTrans resistor value, R
TT
can be determined from the TurboTrans programming, see Equation 3 .
Where C
O
is the total output capacitance in µ F. C
O
values greater than or equal to 1100 µ F require R
TT
to be a
short, 0 Ω . (R
TT
results in a negative value when C
O
> 1100 µ F).
To ensure stability, a minimum amount of output capacitance is required for a given R
TT
resistor value. The value
of R
TT
must be calculated using the minimum required output capacitance determined from the capacitor
transient response charts above.
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