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TDK-Lambda
DBM20
INSTRUCTION MANUAL
PA640-04-01B
CE MARKING / UKCA MARKING
CE Marking, when applied to a product or packing material for a product covered by this handbook, indicates compliance with
the Low Voltage Directive, EMC Directive and RoHS Directive.
UKCA Marking, when applied to a product or packing material for a product covered by this handbook, indicates compliance
with the Electrical Equipment (Safety) Regulations, Electromagnetic Compatibility Regulations and Restriction of the Use of
Certain Hazardous Substances in Electrical & Electronic Equipment Regulations.
1.
Model Name Identification Method
DBM 20
/
2.
Terminal Explanation
+V: +Input/Output terminal
- V: - Input/Output terminal
: Earth Terminal
RED LED: Discharging Indicator. LED will be ON
during Buffering mode.
GREEN LED: Charged Indicator. LED will be ON
during Ready mode.
DC OK: Relay (Photo Mosfet). Logic low when input voltage
is within specification.
Buffer Level: Switch up for Fixed mode and switch down
for VIN-1 mode.
TD
Level
DBM20
FIXED MODE
CHARGING
DISCHARGING
Buffer
VIN‐1
+
: Common supply 3.3 - 30V(max)
Buffer: signal will turn “high” during discharging mode.
Ready: signal will turn “high” after bulk electrolytic
capacitors are charged up.
Inhibit: pull to TTL “low” to activate the inhibit mode.
DISCHARGING
CHARGING
24VDC/20A
+V
DBM20
1
+V ‐V ‐V
2
3
4
4 +
3 Buffer
2 Ready
1 Inhibit
FIXED MODE
VIN‐1
Buffer
Level
Figure 1
1 2
3
4
5
7
11
6
10
9 8
Option (*
1)
Output Current
Model Name
1
2
3
10
4
5
6
7
8
9
11
(*
1)
Type of input and output connector:
Blank :
Standard type
/E :
Spring type
/CO :
With coating on solder side
/CO2 :
With coating on both sides
