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LTC2977 Datasheet(PDF) 44 Page - Analog Devices

Part # LTC2977
Description  30V to 58V Input, Dual 30A, Single 60A 關Module Regulator with Digital Power System Management
PDF  138 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTC2977 Datasheet(HTML) 44 Page - Analog Devices

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LTM4664A
44
Rev. 0
For more information www.analog.com
Table 3. FSWPH_CFG Pin Strapping Look-Up Table to Set the LTM4664A’s PSM Switching Frequency and Channel Phase-Interleaving
Angle (Not Applicable if MFR_CONFIG_ALL[6] = 1b)
RFSWPH_CFG
TOP (kΩ)
RFSWPH_CFG*
BOT (kΩ)
SWITCHING
FREQUENCY (kHz)
θSYNC TO θ0
θSYNC TO θ1
bits [2:0] of
MFR_PWM_CONFIG
bit [4] of
MFR_CONFIG_ALL
14.3
Open
NVM; LTM4664A
PSM
Default = 500
NVM; LTM4664A
Default = 0°
NVM; LTM4664A
PSM
Default = 180°
NVM; LTM4664A PSM
Default = 000b
NVM; LTM4664A PSM
Default = 0b
14.3
32.4
250
0°
180°
000b
0b
14.3
22.6
350
0°
180°
000b
0b
14.3
18.0
425
0°
180°
000b
0b
14.3
15.4
575
0°
180°
000b
0b
14.3
12.7
650
0°
180°
000b
0b
14.3
10.7
750
0°
180°
000b
0b
14.3
7.68
500
120°
240°
100b
0b
14.3
6.34
500
90°
270°
001b
0b
14.3
5.23
External**
0°
240°
010b
1b
14.3
4.22
External**
0°
120°
011b
1b
14.3
3.24
External**
60°
240°
101b
1b
14.3
2.43
External**
120°
300°
110b
1b
14.3
1.65
External**
90°
270°
001b
1b
14.3
0.787
External**
0°
180°
000b
1b
14.3
0
External**
120°
240°
100b
1b
*RFSWPH_CFG value indicated is nominal. Select RFSWPH_CFG from a resistor vendor such that its value is always within 3% of the value indicated in the
table. Take into account resistor initial tolerance, T.C.R. and resistor operating temperatures, soldering heat/IR reflow, and endurance of the resistor over
its lifetime. Thermal shock/cycling, moisture (humidity) and other effects (depending on one’s specific application) could also affect RFSWPH_CFG’s value
over time. All such effects must be taken into account in order for resistor pin-strapping to yield the expected result at every SVIN power-up and/or every
execution of MFR_RESET or RESTORE_USER_ALL, over the lifetime of one’s product.
**External setting corresponds to FREQUENCY_SWITCH (Register 0x33) value set to 0x0000; the device synchronizes its switching frequency to that of
the clock provided on the SYNC pin, provided MFR_CONFIG_ALL[4] = 1b.
Example:
RFSWPH_CFG TOP
VDD25
RFSWPH_CFG BOT
FSWPH_CFG PIN
DUAL 25A/30A PSM OPERATION



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