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Si9978
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Voltage on pins 2 ? 7 with respect to ground . . . . . . . . . . . ? 0.3 to V DD + 0.3 V
Voltage on pin 24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ? 0.3 to 50 V
Voltage on pins 17, 19, 21, 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . ? 0.3 to +60 V
Voltage on pins 18, 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ? 2 to 50 V
RECOMMENDED OPERATING CONDITIONS
V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +20 to 40 V DC
R A , R B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 k W
SPECIFICATIONS
Operating Temperature (T A ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . ? 40 to +85 _ C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ? 65 to 150 _ C
Maximum Junction Temperature (T J ) . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 _ C
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mW
Test Conditions
Unless Otherwise Specified
Limits
? 40 to 85 _ C
Parameter
Symbol
V+ = 20 to 40 V
Min a
Typ b
Max a
Unit
Power
Supply Voltage Range
Logic Voltage
Supply Current
V+
V DD
I+
I DD = 0 mA
20
14.5
16
3
40
17.5
5
V
mA
Inputs (DIR, PWM, EN, QS, MODE, BRK)
High-State
Low-State
V IH
V IL
4.0
1.0
V
High-State Input Current
Low-State Input Current
I IH
I IL
V IH = V DD
V IL = 0 V
? 100
? 50
10
? 25
m A
Outputs
Low-Side Gate Drive, High State
V GBH
14
16
17.5
Low-Side Gate Drive, Low State
High-Side Gate Drive, High State
High-Side Gate Drive, Low State
V GBL
V GTH
V GTL
S A A, B = 0 V
14
16
1
18
1
V
Low-Side Switching, Rise Time
t rL
110
Low-Side Switching, Fall Time
High-Side Switching, Rise Time
High-Side Switching, Fall Time
t fL
t rH
t fH
Rise Time = 1 to 10 V
Fall Time = 10 to 1 V
C L = 600 pF
50
110
50
ns
Break-Before-Make Time
250
FAULT, CL
V OL
I OL = 1 mA
0.4
V
FAULT, CL Leakage Current
I OH
FAULT, CL = V DD
0.2
10
m A
Protection
Low-Side Undervoltage Lockout
UVLL
0.8 V DD
Low-Side Hysteresis
V H
0.8
V
High-Side Undervoltage Lockout
UVLH
S A, B = 0 V
V DD ? 3.3 V
Current Limit
Comparator Input Bias Current
I IB
? 5
? 0.2
5
m A
Comparator Threshold Voltage
One Shot Pulse Width
Propagation Delay
V TH
t p
t pd
T A = 25 _ C
R A , R B = 100 k W , C A , C B = 100 pF
R A , R B = 100 k W , C A , C B = 0.001 m F
C L = 600 pF
90
85
8
80
100
10
100
600
110
115
12
120
mV
m s
ns
Notes:
a. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.
b. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
www.vishay.com
2
Document Number: 70011
S-40804—Rev. E, 26-Apr-04
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