PWM_IN

LG

HG

LM2725, LM2726

SNVS144D – NOVEMBER 2000 – REVISED MARCH 2013

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Electrical Characteristics

LM2726 (continued)

Symbol

Parameter

Condition

Min

Typ

Max

Units

Minimum Positive Input Pulse

Width

55

(1)

ns

Minimum Negative Input Pulse

Width

55

(2)

PWM_IN High Level Input

When PWM_IN pin goes high

2.4

Voltage

from 0V

V

PWM_IN Low Level Input

When PWM_IN pin goes low

0.25

Voltage

from 5V

(1)

If after a rising edge, a falling edge occurs sooner than the specified value, the IC may intermittently fail to turn on the bottom gate when

the top gate is off. As the falling edge occurs sooner and sooner, the driver may start to ignore the pulse and produce no output.

(2)

If after a falling edge, a rising edge occurs sooner than the specified value, the IC may intermittently fail to turn on the top gate when the

bottom gate is off. As the rising edge occurs sooner and sooner, the driver may start to ignore the pulse and produce no output.

TEST CIRCUIT DIAGRAMS

Figure 2. Timing Diagram

Figure 3. Enable Pin Shutdown

6

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