ZXLD1601

SEMICO NDUC TORS

ISSUE 3 - AUGUST 2004

3

Symbol Parameter

Conditions

Min

Typ

Max

Units

T/T

PWM duty cycle range at

‘EN’ input for dc output

voltage control

10kHz<f< 100kHz, VENH =VIN

20

100

%

fLPF

Internal PWM low pass filter

cut-off frequency

4

kHz

ALPF

Filter attenuation

f=30kHz

52.5

dB

T/T

(4)

PWM duty cycle range at

‘EN’ input for ‘gated’ output

voltage control

f < 1kHz, VENH =VIN

0

100

%

(1)

)

NOTES:

4 The maximum PWM signal frequency during this mode of operation should be kept as low as possible to minimize errors due to the turn-off

delay