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SP6661EB中文资料

The SP6661 Evaluation Board is designed with 2 complete SP6661 circuits on one board to help the user evaluate the performance of the SP6661 in both Inverter and Doubler modes.The evaluation board provides easy probe access points to all SP6661 Inputs and Outputs so that the user can quickly connect and measure electrical characteristics and waveforms of the Inverter or Doubler. The SP6661 Evaluation Board also provides a 3V to 5V 150mA DC to DC Converter using the SP6661 Doubler Circuit and a 5V LDO Regulator.

The next two sections describe the SP6661 Board Layout and Using the SP6661 Evaluation Boards. A table of SP6661 Pin Assignments is also included with details on Input/Output pin function. A SP6661 Evaluation Board List of Materials table is provided with some manufac-turers part numbers to use as a reference. Finally, a schematic is included of the SP6661Evaluation Board .

DESCRIPTION

s Easy Evaluation for the SP6661

Inverter/Doubler 200mA Charge Pump

s Only 0.25 sq. in. of Board Space

needed for Inverter or Doubler

s

Doubler and 5V LDO Regulator

s Smallest Industry ’660 Pinout

available with μSOIC package

BOARD LAYOUT

The SP6661 Evaluation Board has been designed to easily and conveniently provide access to all Inputs and Outputs of the SP6661 device under test. Position the board with the silkscreen lettering upright (also see the drawing on the front page of this manual) and you will see two circuits –the Doubler Circuit on top, and the Inverter Circuit below. Also, note the Doubler Circuit is followed by an LDO Circuit, producing a 5V regulated output from a 3V input to the Doubler. The Input and Output connections are made with raised female pin receptacles which can accommodate easy-hook con-nection leads for power and meter connec-tions, as well as scope probe hooks and grounds for waveform https://www.wendangku.net/doc/017096410.html,ING THE EVALUATION BOARD

Connect the SP6661 Evaluation Board Doubler Circuit or Inverter Circuit to a posi-tive power supply for V IN . It is good practice to not switch power on until power connec-tions are made to the evaluation board.Evaluating Doubler Circuit

V IN — U1-3 — Connect to external supply V IN = +2.5 to +5.0V.

GND — U1-5 — Connect to external supply GND.

CAP+ — U1-2 — Use to monitor Charge Pump Frequency (1/2 OSC pin frequency).V OUT — U1-8 — Connect to Load, Meter or Scope. V OUT = +5.0 to +10.0V.

GND — U1-5 — Connect to Load, Meter or Scope GND.

FC — U1-1 — Connect to OPEN for Low Frequency, to V OUT for High Frequency.

SP6661 EVALUATION BOARD

Evaluating Doubler Circuit with 5V LDO Regulator

Same connections as Doubler above, but with additional LDO outputs:

+5 — U2-5 — Connect to Load, Meter or Scope. V OUT = +5.0V.

GND — U2-2 — Connect to Load, Meter or Scope GND.

Evaluating Inverter Circuit

V IN — U3-8 — Connect to external supply V IN = +1.5 to +5.0V.

GND — U3-3 — Connect to external supply GND.

CAP+ — U3-2 — Use to monitor Charge Pump Frequency (1/2 OSC pin frequency).V OUT — U3-5 — Connect to Load, Meter or Scope. V OUT = -1.5 to –5.0V.

GND — U3-3 — Connect to Load, Meter or Scope GND.

FC — U3-1 — Connect to OPEN for Low Frequency, to V OUT for High Frequency.

Evaluating Oscillator Performance with Inverter or Doubler Circuit

To accurately measure the internal oscilla-tor frequency at pin 7 is extremely difficult,since any connection to this pin may induce capacitance which will change the frequency (1/RoscCosc). It is for this reason that the SP6661 Evaluation Board has only a small pad connection to it and not a pin receptacle.Alternatively, you can measure the charge pump frequency at the CAP+ pin, which equals _ the OSC pin frequency.

To run the Inverter or Doubler Circuit at other frequencies, the OSC pin can be driven with an external oscillator with a square wave of 0 to V IN volts. Tests have shown that typi-cally the circuits can perform up to oscillator frequencies of 900kHz.

SP6661 EVALUATION BOARD SCHEMATIC

元器件交易网https://www.wendangku.net/doc/017096410.html,

ORDERING INFORMATION

Part Number Temperature Range Package

SP6661UEB............................................................................................SP6661 Evaluation Board

SP6661EU............................................-40°C to +85°C..............................................8-pin μSOIC

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