BZ025A204ZAB35 AVX Corporation, BZ025A204ZAB35 Datasheet - Page 4

• Manufacturer Part Number: BZ025A204ZAB35
• Manufacturer: AVX Corporation

Specifications of BZ025A204ZAB35

• Tolerance (+ Or -): -20% to 80%
• Voltage: 5.5VDC
• Esr: 60mOhm
• Operating Temp Range: -20C to 70C
• Mounting Style: Through Hole
• Dcl: 20uA
• Product Length (mm): 48mm
• Product Depth (mm): 30mm
• Product Height (mm): 3.5mm
• Product Diameter (mm): Not Requiredmm
• Capacitance: 200000uF
• Package / Case: A-Style
• Lead Free Status / RoHS Status: Compliant

VOLTAGE DROP
Two factors are critical in determining voltage drop when a capacitor delivers a short current pulse; these are
ESR and “available” capacitance as shown in Fig. 4.
Fig. 5 GSM Pulse
The instant voltage drop V (IR) is caused by and is directly proportional to the capacitor’s ESR. The
continuing voltage drop with time V (Q), is a function of the available charge, i.e. capacitance.
From figures 3 and 4, it is apparent that, for very short current pulses, e.g. in the millisecond region, the
combination of voltage drops in a conventional supercapacitor caused by a) the high ESR and b) the lack of
available capacitance, causes a total voltage drop, unacceptable for most applications. Now compare the
BestCap
instantaneous voltage drop, while the very high retained capacitance drastically reduces the severity of the
charge related drop.
EFFICIENCY/TALKTIME BENEFITS OF BESTCAP
Because BestCap
voltage than that available just from the battery as shown in Fig. 5, the efficiency of the RF power amplifier
is improved.
™
performance under such pulse conditions. The ultra-low, (milliOhm), ESR minimizes the
™
, when used in parallel with a battery, provides a current pulse with a substantially higher
3.8
3.6
3.4
3.2
4
3
Vo
Vt
0
Fig 4 Voltage-time relation of capacitor unit
Battery Voltage
1000
t
Battery and Capacitor Voltage
Time (uSeconds)
2000
V(IR)
V(Q)=I*
Vtotal=I*R + I* t/C( t)
3000
t/C( t)
™
Current Pulse
4000
5
4
3
2
1
0