PT7720_13 Datasheet, PDF (2/8 Pages) Texas Instruments – High Efficiency

PT7720 Series
17 A, 12-V Input “Big-Hammer II”
Programmable ISR
Programming Information
VID3 VID2 VID1 VID0
PT7721
VID4=1 VID4=0
Vout
Vout
111 1
2.0V
1.30V
111 0
2.1V
1.35V
110 1
2.2V
1.40V
110 0
2.3V
1.45V
101 1
2.4V
1.50V
101 0
2.5V
1.55V
100 1
2.6V
1.60V
100 0
2.7V
1.65V
011 1
2.8V
1.70V
011 0
2.9V
1.75V
010 1
3.0V
1.80V
010 0
3.1V
1.85V
001 1
3.2V
1.90V
001 0
3.3V
1.95V
000 1
3.4V
2.00V
000 0
3.5V
2.05V
PT7722
VID4=1 VID4=0
Vout Vout
4.5V
6.1V
4.6V
6.2V
4.7V
6.3V
4.8V
6.4V
4.9V
6.5V
5.0V
6.6V
5.1V
6.7V
5.2V
6.8V
5.3V
6.9V
5.4V
7.0V
5.5V
7.1V
5.6V
7.2V
5.7V
7.3V
5.8V
7.4V
5.9V
7.5V
6.0V
7.6V
Logic 0 = Pin 12 potential (remote sense gnd)
Logic 1 = Open circuit (no pull-up resistors)
VID3 and VID4 may not be changed while the unit is operating.
Specifications (Unless otherwise stated, Ta =25°C, Vin =12V, Cin =560µF, Cout =1200µF, and Io =Iomax)
PT7720 SERIES
Characteristics
Output Current
Output Power
Input Voltage Range
Output Voltage Tolerance
Line Regulation
Load Regulation
Vo Ripple/Noise
Transient Response
with Cout = 1200µF
Efficiency
Switching Frequency
Symbols
Io
Po
Vin
∆Vo
Regline
Regload
Vn
ttr
Vos
η
ƒs
Conditions
Ta = +60°C, 200 LFM, pkg N,
Ta = +25°C, natural convection,
Ta = +60°C, 200 LFM, pkg N,
Ta = +25°C, natural convection,
0.1A ≤ Io ≤ 17A
0°C ≤ Ta ≤ +60°C
11V ≤ Vin ≤ 14V (with remote sense)
0.1 ≤ Io ≤ 17A (with remote sense)
Io step between 7.5A and 15A
Vo over/undershoot
Io = 10A
11V ≤ Vin ≤ 14V
0.1A ≤ Io ≤ 17A
Vo ≤5V
Vo ≤5V
Vo ≥5V
Vo ≥5V
(PT7721)
(PT7722)
(PT7721)
(PT7722)
Vo =5.0V
Vo = 3.3V
Vo = 2.5V
Vo = 1.5V
Min
0.1 (1)
0.1 (1)
—
—
11.0
Vo–0.03
—
—
—
—
—
—
—
—
—
—
—
300
Typ
—
—
—
—
—
—
±1
±5
±5
50
100
100
200
90
88
85
78
350
Max
17 (2)
17 (2)
85
85
14.0
Vo+0.03
±2
±10
±10
—
—
—
—
—
—
—
—
400
Units
A
W
V
V
%Vo
mV
mV
mVpp
µSec
mV
%
kHz
Operating Temperature Range
Ta
Storage Temperature
Ts
Mechanical Shock
Mechanical Vibration
Weight
—
—
0
—
-40
Per Mil-STD-883D, Method 2002.3 , 1 msec,
Half Sine, mounted to a fixture
—
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, Soldered in a PC board
—
Vertical —
Horizontal —
—
—
TBD
TBD
53
66
+85 (3)
+125
—
—
—
—
°C
°C
G’s
G’s
grams
Notes: (1) The ISR will operate down to no load with reduced specifications. Please note that this product is not short-circuit protected.
(2) The PT7720 series can be easily paralleled with one or more of the PT7748 Current Boosters to provide increased output current in increments of 17A.
(3) See Safe Operating Area curves or contact the factory for the appropriate derating.
Output Capacitors: The PT7720 series requires a minimum output capacitance of 1200µF for proper operation. Do not use Oscon type capacitors. The maximum allow-
able output capacitance is (57,000 ÷ Vout)µF, or 15,000µF, whichever is less.
Input Filter: An input inductor is optional for most applications. The input inductor must be sized to handle 7ADC with a typical value of 1µH. The input capacitance
must be rated for a minimum of 4 Arms of ripple current when operated at maximum output current and maximum output voltage. Contact an applications specialist
for input capacitor selection for applications at other output voltages and output currents.
For technical support and more information, see inside back cover or visit www.ti.com