BZ015A503ZSB35 AVX Corporation, BZ015A503ZSB35 Datasheet - Page 7

• Manufacturer Part Number: BZ015A503ZSB35
• Manufacturer: AVX Corporation

Specifications of BZ015A503ZSB35

• Tolerance (+ Or -): -20% to 80%
• Voltage: 5.5VDC
• Esr: 230mOhm
• Operating Temp Range: -20C to 70C
• Mounting Style: Planar
• Dcl: 5uA
• Product Length (mm): 28mm
• Product Depth (mm): 17mm
• Product Height (mm): 3.5mm
• Product Diameter (mm): Not Requiredmm
• Capacitance: 50000uF
• Package / Case: S-Style
• Lead Free Status / RoHS Status: Compliant

BESTCAP
BestCap
demand periods. However, the capacitor may also be used as a back-up unit when, for example, the battery is
being replaced.
Back-up time of the BestCap™ may be calculated using the
following formula:
Example: System Clock Time Maintenance
Using a BZ015A503ZAB35 BestCap™ 5.5V, 50mF, 28 x 17 footprint, 3.5 mm (max) height
If Vo = 5.0V
The discharge current of the Cap shall be the sum of the back-up current drain plus leakage current.
Leakage Current is a function of the Capacitor voltage. In the specific case,
the Leakage Current is 5µA at 5.0V and it comes down to <1µA at 2.5V.
In the “worst” case the Leakage Current = 5µA. Practically, the Leakage Current is 3µA[(5+1)/2].
The total discharge current during the back-up period is
40µA (back-up) + 5µA (Leakage Current) = 45µA, in the worst case, or
40µA (back-up) + 3µA (Leakage Current) = 43µA, practically.
Thus the back-up time would be:
t = 50*10
Engineering Guidance Notes
1. Operational and storage temperature
2. Voltage
3. Temperature/Voltage Recommendations
4. Polarity
Rated Voltage Recommended Maximum Applied Voltage
Temperature
-20°C to +70°C. Storage at room temperature is
recommended.
Rated voltage of the capacitor is per the data sheet and
the label on the product. A surge voltage of V rated
+2% may be applied to the capacitor for <5 sec without
damage or performance degradation.
BestCap
positive and negative voltages. The polarity marking on
3.5V
4.5V
5.5V
At low current (as is the case in the back-up application):
™
–3
™
is normally utilized as a power-boosting device to assist the main battery during pulse power
* (5–2.5)/45*10
capacitors are non-polar, so can handle both
™
Vt = 2.5V
IN BATTERY BACK-UP APPLICATIONS
-20°C to +35°C
t = C V/I = C*(Vo – Vt)/I
3.5V
4.5V
5.5V
V = Vo – Vt – I * R
–6
C = I * t / V
V = Vo – Vt
= 46 minutes
I
(Back-up)
+35°C to +70°C
= 40µA (40*10
ESR
3.2V
4.2V
5.0V
–6
Amp.)
5. Mounting
6. Other Precautions
the label relates to internal test procedures only and may
be ignored in normal use.
BestCap
soldering of the device is acceptable. When hand
soldering, use a soldering iron of <30W rating and ensure
that the tip temperature does not exceed +350°C.
Duration of the soldering operation should be <3 sec.
Mounting chips which may be automatically placed, (i.e.
via Pick n’ Place machine) and reflow soldered, and into
which the BestCap
available for some versions of BestCap
with your AVX Sales Office for further information.
•
•
•
Do not disassemble the capacitor
Do not dispose of the capacitor by incineration.
Should the internal material come in contact with the
skin or eyes, wash/rinse thoroughly with running
water.
™
may not be reflow or wave soldered. Hand
I is the back-up current drain in Amperes
™
t = back-up time in seconds
R
C is the Capacitance in F
Vo is the initial voltage
may subsequently be inserted, are
ESR
Vt is the end voltage
is the ESR in Ohms
Where
™
. Please check