TB62706 データシートの表示（PDF） - Toshiba

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TB62706

Bi−CMOS INTEGRATED CIRCUIT SILICON MONOLITHIC

Toshiba 

TB62706BN/BF

[1] Output current (IOUT)

IOUT is set by the enternal resistor (R−EXT) as shown in Fig.1.

[2] Total supply voltage (VLED)

This device can operate 0.4~0.7V (VO).

When a higher voltage is input to the device, the excess voltage is consumed inside the device, that leads to

power dissipation.

In order to minimize power dissipation and loss, we would like to recommend to set the total supply voltage as

shown below,

VLED (total supply voltage) = VCE (Tr Vsat) + Vf (LED Forward voltage) + VO (IC supply voltage)

When the total supply is too high considering the power dissipation of this device, an additional R can

decrease the supply voltage (VO).

[3] Pattern layout

This device owns only one ground pin that means signal ground pin and power ground pin are common.

If ground pattern layout contains large inductance and impedance, and the voltage between ground and

LATCH, CLOCK terminals exceeds 2.5 V by switching noise in operation, this device may miss−operate. So we

would lile you to pay attention to pattern layout to minimize inductance.

11

2006-06-14

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