Regulated 28 A DC Power Supplies
Models 1689 & 1690
Data Sheet
www.bkprecision.com
Technical data subject to change
© B&K Precision Corp. 2014
v040914
Models 1689 and 1690 are high current DC power supplies designed for continuous duty. These power
supplies provide up to 28 A maximum current output continuously hour after hour without overheating,
making them ideal car battery substitutions for servicing or powering high power car stereos, cellular
phone products, or ham radios.
The models offer analog (model 1689) or digital (model 1690) displays with multiple output terminals.
Two pairs of 3 A, snap-in connectors are easily accessible on the front panel, and a pair of 28 A screw-on
output terminals are located on the rear panel.
Features & Benefits
■1 V to 15 V variable output
■28 A output at 13.8 V*
■Overload protection
■High RFI stability
■Multiple DC output terminals
(one 28 A and two 3 A output
terminals)
Specifications 1689 1690
OUTPUT
Voltage 1-15 V
Current *28 A (at 13.8 V)
Line Regulation 5 mV (±2% Load)
Load Regulation 50 mV (0-100% Load)
Ripple & Noise 5 mV
METERING
Accuracy 7% F.S. ±(0.2% + 2 digits)
GENERAL
Display Precision Analog Digital LED
AC Input 110 VAC, 60 Hz
Dimension (W x H x D) 9.84” x 5.5” x 8.86" (250 x 140 x 225 mm)
Weight 19.9 lbs. (9 kg)
One-Year Warranty
Supplied Accessories User manual
Model 1689 Model 1690
Graph showing relationship between
output voltage and output current
024 6 810 12 14 16
35
30
25
20
15
10
5
0
Output Voltage (V)
Output Current (A)
* See graph for output current and output voltage
Output Voltage and Current
