FP7151

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Rev. 0.63

6/13

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Duty cycle range of PWM signal

applied to ADJ pin during low

frequency PWM dimming mode

PWM frequency <500Hz

Measured on ADJ pin

0.01

1

Brightness Control Range

100:1

Duty cycle range of PWM signal

applied to ADJ pin during high

frequency PWM dimming mode

PWM frequency >10kHz

Measured on ADJ pin

0.16

1

Brightness Control Range

5 :1

Soft Start Time

Time taken for output

current to reach 90% of

final Value after voltage on

ADJ pin has risen above

0.3V

500

µs

Operating Frequency

(See Graphs for more Detail)

ADJ pin floating

L=100μH (0.82Ω)

Driving 1 LED

250

KHz

Minimum Switch ‘ON’ Time

200

ns

Minimum Switch ‘OFF’ Time

200

ns

Recommended Maximum

Operating

Frequency

1

MHz

Recommended Duty Cycle

Range of

Output Switch at fLXmax

0.3

0.7

Internal Comparator Propagation

Delay

50

ns

Notes：