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
APPLICATION INFORMATION
ADJUSTING THE OUTPUT VOLTAGE
R
SET
+ 10 kW
0.69
V
O
* 0.69
* 1.43 kW
(1)
UDG−06043
R
SET
1%
0.05 W
V
O
+Sense
−Sense
VoAdjGND
PTH04T240W/241W
3,4
5
6
7
8
+Sense
−Sense
GND
V
O
PTH04T240W , PTH04T241W
SLTS276D – OCTOBER 2006 – REVISED JULY 2009 ......................................................................................................................................................
www.ti.com
The V
o
Adjust control (pin 8) sets the output voltage of the PTH04T240/241W. The adjustment range is 0.69 V to
3.6 V. The adjustment method requires the addition of a single external resistor, R
SET
, that must be connected
directly between the V
o
Adjust and – Sense pins. Table 1 gives the standard value of the external resistor for a
number of standard voltages, along with the actual output voltage that this resistance value provides.
For other output voltages, the value of the required resistor can either be calculated using the following formula,
or simply selected from the range of values given in Table 2 . Figure 9 shows the placement of the required
resistor.
Table 1. Standard Values of R
SET
for Standard Output Voltages
V
O
(Standard) (V) R
SET
(Standard Value) (k Ω ) V
O
(Actual) (V)
3.3
(1)
1.21 3.304
2.5
(1)
2.37 2.506
1.8
(1)
4.75 1.807
1.5
(1)
6.98 1.510
1.2 12.1 1.200
1 20.5 1.004
0.7 681 0.700
(1) The minimum input voltage is 2.2 V or (V
O
+ 0.5) V, whichever is greater.
(1) R
SET
: Use a 0.05 W resistor with a tolerance of 1% and temperature stability of 100 ppm/ ° C (or better). Connect the
resistor directly between V
O
Adjust (pin 8) and -Sense (pin 7), as close to the regulator as possible, using dedicated
PCB traces.
(2) Never connect capacitors from V
O
Adjust (pin 8) to either +Sense (pin 6), GND, or V
O
(pin 5). Any capacitance added
to the V
O
Adjust pin affects the stability of the regulator.
Figure 9. V
O
Adjust Resistor Placement
12 Submit Documentation Feedback Copyright © 2006 – 2009, Texas Instruments Incorporated
Product Folder Link(s): PTH04T240W PTH04T241W