Note: Please attach thermocouple on NTC resistor to test OTP function, the hot spots’ temperature is just for reference. And the OTP is Adjustable via PMBus.
(T
A
=25°C, airflow rate=400 LFM, V
in
=48Vdc, nominal Vout unless otherwise noted.)
DS_E48SD12020_07042013
E-mail DCDC@delta.com.tw
http://www.deltaww.com/dcdc
P2
DIGITAL INTERFACE SPECIFICATIONS
PARAMETER
PMBUS SIGNAL INTERFACE CHARACTERISTICS
Input High Voltage (CLK, DATA)
Input Low Voltage (CLK, DATA)
Input high level current (CLK, DATA)
Input low level current (CLK, DATA)
Output Low Voltage (SMBALERT#)
Output high level open drain leakage current
(SMBALERT#)
PMBus Operating frequency range
NOTES and CONDITIONS
Min.
2.1
0
-10
-10
IOUT=2mA
VOUT=3.6V
0
100
IOUT =20A
-3
E48SD12020
Typ.
Max.
3.6
0.8
10
10
0.4
10
400
+3
1
-2
0
-5
+2
+5
Units
Vdc
Vdc
uA
uA
Vdc
uA
kHz
Adc
%
Vdc
°C
°C
Measurement System Characteristics
Output current reading accuracy
VOUT reading accuracy
VIN reading accuracy
Temperature sense range
Temperature reading accuracy
(T
A
=25°C, airflow rate=400 LFM, V
in
=48Vdc, nominal Vout unless otherwise noted.)
PIN DEFINATION
Pin#
1
2
3
4
5
6
7
8
Name
VIN(+)
ON/OFF
VIN(-)
VOUT(-)
SENSE(-)
TRIM
SENSE(+)
VOUT(+)
Note1: see the last page.
Remote sense
Trim
note 1
Function
9
Primary on/off
control pin
Pin#
C2
Name
Function
PGOOD pin, and this pin also could be configurated as secondary on/off control pin
Signal ground
PMBus data line
10
11
12
13
14
15
SIG_GND
DATA
SMBALERT PMBus SMBAlert line
CLOCK
ADDR1
ADDR0
PMBus clock line
ADDR1 pin sets the high order digit of the address.
ADDR0 pin sets the low order digit of the address.
Remote sense
DS_E48SD12020_07042013
E-mail DCDC@delta.com.tw
http://www.deltaww.com/dcdc
P3
SIMPLIFIED APPLICATION CIRCUIT
Delta DC/DC
Module
Fuse
VIN(+)
ON/OFF
ADDR0 ADDR1
VOUT(+)
SENSE(+)
Resistance of trace
Input source
Reverse voltage
protect
EMI filter
TRIM
SENSE(-)
Load
VIn(-)
CLOCK
VOUT(-)
SMB-ALERT
C2
DATA
Resistance of trace
On/off control
CLK
DATA
ALERT PGOOD / ON/OFF
System MCU
DS_E48SD12020_07042013
E-mail DCDC@delta.com.tw
http://www.deltaww.com/dcdc
P4
ELECTRICAL CHARACTERISTICS CURVES
97
95
93
14
18
16
75Vin
EFFICIENCY(%)
48Vin
89
87
85
83
81
79
77
2
4
6
8
10
12
14
POWER DISSIPATION (W)
91
75Vin
38Vin
12
48Vin
10
38Vin
8
6
4
16
18
20
2
2
4
6
8
10
12
14
16
18
20
OUTPUT CURRENT (A)
OUTPUT CURRENT(A)
Figure 1:
Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C.
7
Figure 2:
Power loss vs. load current for minimum, nominal, and
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