IBM 770 User Manual
Output Protection
A short circuit placed on any dc output (between two outputs or
between an output and a dc return) latches all dc outputs into a
shutdown state, with no hazardous condition to the power supply.
between an output and a dc return) latches all dc outputs into a
shutdown state, with no hazardous condition to the power supply.
If an overvoltage fault occurs in the power supply, the power supply
latches all dc outputs into a shutdown state before any output
exceeds 135% of the nominal value of the power supply.
latches all dc outputs into a shutdown state before any output
exceeds 135% of the nominal value of the power supply.
Voltage Sequencing
When power is turned on, the output voltages reach their operational
voltages within 2 seconds.
voltages within 2 seconds.
Power Supply Connector
The following connector is used with the AC adapter. The total
power capacity of this connector must not exceed 4.0 A.
power capacity of this connector must not exceed 4.0 A.
Refer to Figure 1-9 for the appropriate adapter pin assignments.
Figure
1-9. Voltage Pin Assignments for the 56W AC Adapter
Pin
Voltage
1
+
7.0 V dc to
+
17.0 V dc (depending on charging conditions)
2
Ground
Battery Pack
The ThinkPad computer uses a lithium-ion (Li-ion) battery pack that
meets the following electrical specifications:
meets the following electrical specifications:
System Overview
1-11