HA16141P/FP, HA16142P/FP

Rev.4, Sep. 2001, page 15 of 15

6. Integrator (PWM-CS detection operation)

PWM-RES

(internal signal)

PWM-CS

(current sense

input)

TIM pin current

(integral output

current)

TIM pin voltage

(integral output

voltage)

LATCH STATUS

(for PFC-STOP)

LATCH STATUS

(for PWM-STOP)

1V

0

5.2

µA

−33µA

2.5V

4V

0.2V

PFC Enable

PWM Enable

PFC Stop

PWM Stop

t-tim2

t-tim2'

Note: Timer time calculation equation

Timer time t-tim2 is the time until PG pin inversion (from low to high) after the PWM-CS pin trigger.

t-tim2 can be set using the following approximate equation.

t-tim2

The time at which both the PFC and PWM functions are stopped by this timer can be calculated

using the following approximate equation.

t-tim2' = 1.65

⋅ t − tim2 ⋅ ⋅ ⋅ ⋅ ⋅ Typical calculation

=

−Ctim ⋅ (Vlch − pfc − 0.2V) / Isrc − tim2

=

−Ctim ⋅ (2.5V − 0.2V) / (−33µA) ⋅ ⋅ ⋅ ⋅ ⋅ Typical calculation