Texas Instruments Dual Phase Eco-Mode™ Step Down Converter for 40A+ Appllications using the TPS51727 TPS51727EVM TPS51727EVM Datenbogen
Produktcode
TPS51727EVM
Configuration
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5.1
Current Limit Trip Selection (J8: Trip Select)
The overcurrent protection (OCP) can be set by J8 Trip Select.
Default setting is 30 mV.
Table 2. Current Limit Trip Selection
Jumper Set To
Trip Select
OCP Limit per Phase (Typical)
Top (7-8 pin shorted)
GND (15 mV)
15.1 A
Second (5-6 pin shorted)
VREF (20 mV)
18.4 A
Third (3-4 pin shorted)
3.3VBIAS (25 mV)
22.3 A
Bottom (1-2 pin shorted)
V5FILT(30 mV)
27.9 A
5.2
Frequency Selection (J7: TON Select)
The operating frequency can be set by J7 TON Select.
Default setting is 300 kHz.
Table 3. Frequency Selection
Jumper Set To
TON Select
Frequency (kHz)
Top (7-8 pin shorted)
GND
200
Second (5-6 pin shorted)
VREF
300
Third (3-4 pin shorted)
3.3VBIAS
400
Bottom (1-2 pin shorted)
V5FILT
500
5.3
Overshoot Reduction Selection (J9: OSR™ Select)
The overshoot reduction can be set by J9 OSR™ Select.
Default setting is Minimum.
Table 4. Overshoot Reduction Selection
Jumper Set To
OSR
Overshoot Voltage
Top (7-8 pin shorted)
GND (Minimum)
Minimum
Second (5-6 pin shorted)
VREF (Medium)
Medium
Third (3-4 pin shorted)
3.3VBIAS (Maximum)
Maximum
Bottom (1-2 pin shorted)
V5FILT (Off)
OSR Off
5.4
VID Bits Selection (S1)
The output voltage can be set by Switch S1(VID Bits).
Default setting is 0000.
Table 5. VID Bits Selection
(1)
VID3
VID2
VID1
VID0
Vout(V)
0
0
0
0
1.250
0
0
1
1
1.175
0
1
0
1
1.125
0
1
1
1
1.075
1
0
0
1
1.025
1
0
1
1
0.975
(1)
4-Bit VID Table (1=3.3VBIAS=on, 0=GND=off)
8
Using the TPS51727EVM, a Dual-Phase, Eco-mode™ Step-Down Power
SLUU379 – November 2009
Management IC for 40-A+ Application
Copyright © 2009, Texas Instruments Incorporated