Analog Integrated Circuit Device Data

10

Freescale Semiconductor

34844

ELECTRICAL CHARACTERISTICS

DYNAMIC ELECTRICAL CHARACTERISTICS

DYNAMIC ELECTRICAL CHARACTERISTICS

Table 4. Dynamic Electrical Characteristics

PIN & NIN = VDC1, -40

Characteristic

Symbol

Min

Typ

Max

Unit

BOOST

Switching Frequency (BST [1:0]=0)

0.14

0.15

0.17

MHz

Switching Frequency (BST [1:0]=1)

0.27

0.30

0.33

MHz

Switching Frequency (BST [1:0]=2)

0.54

0.60

0.66

MHz

Switching Frequency (BST [1:0]=3)

1.08

1.2

1.32

MHz

Minimum Duty Cycle

-

10

15

%

Maximum Duty Cycle

80

85

-

%

Soft Start Period

-

6.5

-

ms

Boost Switch Rise Time(9)

-

15

-

ns

Boost Switch Fall Time(9)

-

25

-

ns

PWM GENERATOR

Input PWM Frequency Range (9)

M/~S = Low (Slave Mode)

100

-

25000

Hz

PWM Frequency

M/~S = High (Master Mode)

FPWM Register = 768

FPWM Register = 192,000

22500

90

25000

100

27500

110

Hz

PWM dimming resolution

-

0.39

-

%

PWM PIN CHANNEL DRIVER

Input PWM Pin Minimum Pulse(9)

150

-

-

ns

PHASE LOCK LOOP

CK Slave Mode Frequency Lock Range(8)

M/~S = Low (Slave Mode)

100

-

25000

Hz

CK Slave Mode Input Jitter(9)

M/~S = Low (Slave Mode)

-

-

0.1

%

Slave Mode Acquisition Time

M/~S = Low (Slave Mode)

-

-

-

2000

50

-

ms

ms

CK Frequency (Master Mode)

FPWM Register = 768

FPWM Register = 192,000

22500

90

25000

100

27500

110

Hz

Notes

8.

Special considerations should be made for frequencies between 100Hz to 1KHz. Please refer to Functional Device Operation for further

details.

9.

Guaranteed by design