Datasheet

2
dc1978af
DEMO MANUAL DC1978A
DESCRIPTION
• Four OV/UV V
OUT
and One V
IN
Supervisor
• Four Overcurrent/Undercurrent Supervisors
• Supports Multichannel Fault Management
• Operates Autonomously without Additional Software
• Powered from 3.3V or 4.5V to 15V
• Available in 64-Lead 9mm × 9mm QFN
PERFORMANCE SUMMARY
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
PWR
Supply Input Voltage Range 4.5 15 V
V
DD33
Supply Input Voltage Range 3.13 3.47 V
ADC Total Unadjusted Error V
IN_ADC
≥ 1V ±0.25 %
ADC Voltage Sensing Input Range Differential Voltage: V
IN_ADC
= (V
SENSEP[n]
– V
SENSEM[n]
)
V
SENSEM[n]
0
–0.1
6
0.1
V
V
ADC Voltage Sensing Resolution 122 μV/LSB
ADC Current Sense Input Range I
SENSEP[n]
, I
SENSEM[n]
Differential Voltage: V
IN_ADC
= (I
SENSEP[n]
– I
SENSEM[n]
)
–0.1
–170
6
170
V
mV
ADC Current Sense Resolution RSENSE(IOUT_CAL_GAIN) = 1Ω
0mV ≤ |V
IN_ADC
| < 16mV
16mV ≤ |V
IN_ADC
| < 32mV
32mV ≤ |V
IN_ADC
| < 63.9mV
63.9mV ≤ |V
IN_ADC
| < 127.9mV
127.9mV ≤ |V
IN_ADC
|
15.265
31.25
62.5
125
250
μA/LSB
μA/LSB
μA/LSB
μA/LSB
μA/LSB
Trim DAC Resolution 10 Bits
Trim DAC Full Scale Output Voltage Buffer Gain Setting 0 (MFR_CONFIG(dac_gain) = 0)
Buffer Gain Setting 1 (MFR_CONFIG(dac_gain) = 1)
1.38
2.65
V
V
Temperature Sensor Resolution 0.136 °C/LSB
Voltage Supervisor Input Voltage Range Low Resolution, V
IN_VS
= (V
SENSEP[n]
– V
SENSEM[n]
)
High Resolution, V
IN_VS
= (V
SENSEP[n]
– V
SENSEM[n]
)
V
SENSEM[n]
0
0
–0.1
6
3.8
0.1
V
V
V
Voltage Supervisor Sensing Resolution 0V to 3.8V Range
0V to 6V Range
4
8
mV/LSB
mV/LSB
Voltage Supervisor Total Unadjusted
Error
2V < V
IN_VS
< 6V, Low Resolution Mode
1.5V < V
IN_VS
< 3.8V, High Resolution Mode
0.8V < V
IN_VS
< 1.5V, High Resolution Mode
±1.25
±1.0
±1.5
%
%
%
Current Supervisor Input Range I
SENSEP[n]
, I
SENSEM[n]
–0.1 6 V
Differential Voltage: V
IN_CS
= (I
SENSEP[n]
– I
SENSEM[n]
)) –170 170 mV
Current Supervisor Resolution IOUT_xC_FAULT_LIMIT × IOUT_CAL_GAIN 400 μV/LSB
Current Supervisor Total Unadjusted
Error
50mV ≤ V
IN_CS
≤ 170mV
V
IN_CS
< 50mV
±3
±1.5
%
mV
I
2
C Serial Clock Frequency 10 400 kHz
DC1978A Power Supply Specifications
POWER SUPPLY CHANNEL CH0 CH1 CH2 CH3
Controller LTC3860, V
OUT1
LTC3860, V
OUT2
LTM4620, V
OUT1
LTM4620, V
OUT2
Nominal Untrimmed Output Voltage 1.8V ± 2.1 % 1.5V ± 2.1 % 1.2V ± 2.1 % 1.0V ± 2.1 %
Rated Output Current 2A 2A 5A 5A
Output Trim Range (V
DAC_FS
= 1.38V) 13/–19 % 11 /–15% 16/–21 % 16/–21 %
Specifi cations valid over full operating temperature range.
DC1978A DEMO SYSTEM SPECIFICATIONS