T
U
nit 8A
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Newbury. RG14 5RU
el: +44 (0) 1635 521858
Fax: +44 (0) 1635 523771
www.powersolve.co.uk
SM 1500 with Power Sink Option
2 Quadrant operation: Source and Sink
Models Order Code
SM 15-100 P202
SM 35-45 P203
SM52-AR-60
The power sink option permits the power supply to absorb
bursts of power fed back to the unit. An internal module senses
the status of power supply and sinks current across the output
terminals, thus maintaining a constant output voltage.
The Power Sink Option allows a faster response when the
power supply is step programmed to a lower voltage at small
load conditions.
• Can absorb 200 W peak power
• Maintains output voltage setting regardless output power
is positive or negative (source and sink)
• Ideal solution for supplying electric motors with
PWM-speed control. These systems often return power to
the power supply during a braking action
• Ideal solution for ATE systems requiring fast down
programming at no load conditions
• Generation Automotive waveforms (fast)
SM 52-30 P204
SM 52-AR-60 P205
SM 70-22 P206
SM35-45 with Power Sink Op tion
Cur rent – 20 A means the load de liv ers 20 A to
the power sup ply (sink op er a tion)
Up per trace: out put volt age
Lower trace: out put cur rent
(cur rent switch ing from +20 A to –20 A at Vo=6 V)
Datasheet - SM1500 Power Sink
SM35-45 with out Power Sink Op tion
The out put volt age is out of con trol when
the out put cur rent is neg a tive
Up per trace: out put volt age
Lower trace: out put cur rent
(cur rent switch ing from +20 A to –20 A at Vo=6 V)
SM1500 - P202- 206
Power Sink Spec i fi ca tions
SM15-100
option P202
SM35-45
option P203
SM52-30
option P204
SM52-AR-60
option P205
SM70-22
option P206
Sink Power Rat ing
max. peak power (elec tron i cally lim ited)
max. con tin u ous power (T
max. con tin u ous power (T
. = 25 °C)
amb
. = 50 °C)
amb
200 W
175 W
90 W
Max. du ra tion Sink Peak Power
P
= 200 W, T
sink
. = 25 °C
amb
max. ton = 60 s, fol low ing t
= 400 s (for cool ing down)
off
Duty Cy cle for use at Peak Power
P
= 200 W, T
sink
P
<= 200 W, ton <= 20 s
sink
amb
. = 25 °C
ton <= 20 s / t
av er age power <= 175 W
>= 10 s
off
ton = time, power dis si pa tion is > 0 W
t
= time, power dis si pa tion is 0 W
off
Pav = P
peak
* ton / (t
off
+ ton)
Max. Sink Cur rent
(Vo >= 2 V and P <= 200 W) Lim ited at 40 A Lim ited at 40 A Lim ited at 30 A Lim ited at 40 A Lim ited at 30 A
Pro tec tion Elec tronic Power Limit (200 W) lim its the cur rent.
The tem per a ture of the power sink is fan con trolled and
the cir cuit shuts down in case of ther mal over load.
Re cov ery time / De vi a tion
Vo = 6 V, Io: +40 A → –15 A
re cov ery within 100 mV / de vi a tion:
Vo = 15 V, Io: +25 A → –8 A
re cov ery within 100 mV / de vi a tion:
Vo = 35 V, Io: +20 A → –3 A
re cov ery within 100 mV / de vi a tion:
di/dt = –1.7 A/µs
300 µs / 0.20 V
di/dt = –1.6 A/µs
500 µs / 0.15 V
-
di/dt = –1.7 A/µs
500 µs / 0.45 V
di/dt = –1.6 A/µs
600 µs / 0.40 V
di/dt = –1.3 A/µs
1.10 ms / 0.35 V
-
di/dt = –1.6 A/µs
640 µs / 0.70 V
di/dt = –1.3 A/µs
800 µs / 0.60 V
di/dt =–1.7 A/µs
700 µs / 0.50 V
di/dt = –1.3 A/µs
900 µs / 0.45 V
di/dt = –0.83 A/µs
1.30 ms / 0.35 V
di/dt = –1.3 A/µs
800 µs / 0.70 V
-
-
Vo = 52 V, Io: +10 A → –2 A
re cov ery within 100 mV / de vi a tion:
Vo = 70 V, Io: +10 A → –1 A
re cov ery within 100 mV / de vi a tion:
(load cur rent switches from pos i tive
to neg a tive)
Pro gram ming Down Speed
Fall time at no load (90 - 10%)
Fall time at no load with out Power Sink
Unit with Fast Pro gram ming Op tion
Fall time at no load (90 - 10%)
Fall time at no load with out Power Sink
Par al lel and Se ries op er a tion
Re fer to power sink man ual for
de tails and re stric tions.
Notes:
• The maximum sink current at higher voltages will not be the maximum specified current due to the power limit.
For example at 30 V the maximum sink current will only be 6.7 A (30 V x 6.7 A = 200 W = maximum power).
• A higher sink current than the maximum current will cause the output voltage to rise.
-
-
note: val ues
are typ i cal
(15 → 0 V)
8 ms
2 s
P202+P211
320 µs
60 ms
-
-
note: val ues
are typ i cal
(35 → 0 V)
18 ms
5.5 s
P203+P212
570 µs
200 ms
di/dt = –0.7 A/µs
800 µs/ 0.60 V
-
note: val ues
are typ i cal
(52 → 0 V)
10 ms
4 s
P204+P212
650 µs
270 ms
di/dt = – 0.6 A/µs
1.90 ms / 0.35 V
-
note: val ues
are typ i cal
(26 / 52 → 0 V)
10 ms / 45 ms
4 s / 7.5 s
P205+P213
550 µs / 1.2 ms
170 ms / 550 ms
Us ing mul ti ple units in par al lel op er a tion, only one unit can have a power sink .
Us ing mul ti ple units in se ries op er a tion, all units must have a power sink .
di/dt = –0.6 A/µs
1.00 ms / 0.70 V
di/dt = – 0.6 A/µs
1.20 ms / 0.50 V
note: val ues
are typ i cal
(70 → 0 V)
18 ms
5.5 s
P206+P214
1.0 ms
550 ms
SM35-45 with Power Sink Op tion
fast dis charge of out put ca pac i tors
by the power sink circuit
trace: out put volt age
Volt age Pro gram ming Speed at NO LOAD
SM35-45 without Power Sink Op tion
slow re sponse time dur ing volt age step down,
time needed to dis charge the out put ca pac i tors
trace: out put volt age
Volt age Pro gram ming Speed at NO LOAD
Page 1 - 2 Datasheet - SM1500 Power Sink 2006, rev. Dec. 2009
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