HA16116FP/FPJ, HA16121FP/FPJ

8

The triangle wave is a voltage waveform used as a reference in creating a PWM pulse. This block operates

according to the following principles. A constant current I

is made to flow continuously to external timing capacitor C

When the C

comparator threshold voltage V

from C

Next, when the C

causes the switch to operate, stopping the I

The triangle wave is generated by this repeated

operation.

Note that I

should be set to

≥ 5 kΩ (I

With this IC series, V

internal resistors R

1

1.1 V

=

(2

− 1) × 1.1 V/R

T

1.1 V

1

≈

1

[Hz]

0.6

1.1

Accordingly,

Here,

Note that the value of f

in the comparator circuit. Also, at high frequencies this comparator delay can cause triangle wave

overshoot or undershoot, skewing the dead band threshold. Confirm the actual value in implementation

and adjust the constants accordingly.