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参数资料
| 型号： | CBC5300-24C |
| 厂商： | Cymbet Corporation |
| 文件页数： | 7/11页 |
| 文件大小： | 0K |
| 描述： | ENERCHIP EH CBC5300 MODULE |
| 产品目录绘图： | CBC5300-24C Module |
| 特色产品： | EnerChip? EH Energy Harvesting Module EnerChip? EH Solar Energy Harvesting Evaluation Kit |
| 标准包装： | 16 |
| 系列： | EnerChip™ EH |
| 模块/板类型： | 能量收集模块 |
| 适用于相关产品： | 薄膜充电式固态电池 |
| 产品目录页面： | 709 (CN2011-ZH PDF) |
| 相关产品： | 859-1009-6-ND - IC BATT SOLID ST ENERCHIP 16QFN 859-1009-1-ND - IC BATT SOLID ST ENERCHIP 16QFN 859-1009-2-ND - IC BATT SOLID ST ENERCHIP 16QFN 859-1005-5-ND - IC BATT SOLID ST ENERCHIP 16QFN |
| 其它名称： | 859-1000-5 |
Preliminary
EnerChip EH CBC5300
As configured, the CBC5300 will operate with many transducer types. However, performance specifications
of transducers - namely output impedance - will affect the power conversion efficiency of the CBC5300 kit as
designed. Please contact Cymbet Applications Engineering at the phone number shown below to discuss your
specific application and desired transducer(s).
The CBC5300 module is designed to work with transducers having an output impedance over the range of 58?
to 4k? and an input voltage range of 270mV to 1.5V. The minimum open circuit voltage to start operation is
700mV. Peak efficiency will occur at a nominal transducer input voltage of 800mV to 1.0V at 1k?. Operating
characteristics for most transducer types are typically available from the manufacturer’s data sheet. An
example photovoltaic cell operating curve is shown below. Output impedance, operating voltage, and peak
power point can also be verified by empirical measurements. To do this, measure the load voltage and current
as a variable load impedance across the transducer is swept over a broad enough range where the peak power
point can be found by finding the maximum product of the measured load voltage and current.
V OC : Open-circuit voltage
I SC : Short-circuit current
V OP : Optimum operating voltage
I OP : Optimum operating current
P MAX : Maximum operating power
Current-Voltage Curve
To configure the CBC5300 to work with a given transducer, the optimal transducer operating voltage point
must first be obtained though the manufacturer’s data sheet or from empirical measurements. Next calculate
the values needed for a voltage divider to set the operating voltage point on the V OPER pin (pin 10). The top
of the voltage divider shown in Figure 3 uses V REG (pin 11) as its voltage source; the bottom of the voltage
divider is connected to ground. V OPER is equal to V REG * (R2 / (R1 + R2)), where V REG is nominally 4.06V and
R2 (bottom resistor) is in the range of 500k? to 1M? with the optimal value around 750k?. Note: Better
circuit performance (i.e., less input ripple voltage) will be obtained if R2 is made smaller than 750k?. A more
useful formula is: R1 = R2 * ((V REG / V OPER ) - 1). Example: For a 1k? photovoltaic cell with operating voltage of
1.01V, R1 can be determined as R1 = 1M? * ((4.06V / 1.01V) - 1) = 3.02M?. A 3.01M? resistor is the nearest
standard value. R2 was chosen as a standard resistor value. 750k? for R2 is also a standard resistor value but
the V OPER voltage will be further away from nominal due to the standard resistor values available for R1.
Capacitor C1 (47μF) is used to set the bandwidth of the boost converter control loop. If a low impedance
transducer is used the value of C1 might have to be reduced in value. This can be verified using an oscilloscope
to check the waveform on GATE (pin 3). The waveform should be three pulses followed by a longer interval,
followed again by three pulses. The three pulses will have approximately 16.7μs of high duration followed by
16.7μs of low duration. If more than three pulses are in the waveform then the value of C1 should be reduced
to obtain the nominal waveform.
Setting the Under Voltage Lockout Voltage
The under voltage lockout (UVLO SEL) voltage should be set at or above the operating point, V OPER, in order to
prevent the EnerChip from inadvertently powering the boost converter when insufficient input transducer power
is available. Normally, UVLO should be set to a value that is 20% to 80% above V OPER. UVLO SEL can be set by
adding one or more series diodes between UVLO SEL and V IN. For example, the nominal voltage at UVLO SEL is
700mV; to raise it to 1.4V, insert one standard silicon diode. To reach intermediate voltages, Schottky diodes
may be used.
DS-72-06 Rev06
?2009 Cymbet Corporation ? Tel: +1-763-633-1780 ? www.cymbet.com
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