IMP38C42/D データシートの表示（PDF） - A1 PROs co., Ltd.
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IMP38C42/D Datasheet PDF : 10 Pages
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IMP38C/HC/42/3/4/5
Electrical Characteristics
Unless otherwise noted, VCC = 15V, RT = 10kΩ and CT = 3.3nF. Specifications are over the – 40°C to +85°C ambient temperature range.
Bold/blue specifications indicate enhanced performance features.
Parameter
Symbol Conditions
Min Typ Max Units
Current Sense
Gain
Over Current Protection Threshold
AVOL
Notes 1, 2 and 3
Vcomp = max, Note 2
2.90
3.00
3.10
V/V
0.9
0.98
1.1
V
Power Supply Rejection Ratio
Input Bias Current
Delay to Output
Output
PSRR
IB
TPD
VSTART ≤ VCC ≤ 18V
VFB = 0V, ISNS 0V to 2V, CL = 1nF
70
dB
– 0.1 – 2.0
µA
50
65
ns
IMP38C4x
ON Resistance, High
ON Resistance, Low
IMP38HC4x
ON Resistance, High
ON Resistance, Low
Peak Drive Current
RDS (ON)
ISOURCE = 0.2A
ISINK = 0.2A
RDS (ON)
ISOURCE = 0.2A
ISINK = 0.2A
HC devices
20
Ω
11
10
Ω
5.5
1.0
A
H devices
0.5
IMP38C4x Rise Time
IMP38C4x Fall Time
IMP38HC4x Rise Time
IMP38HC4x Fall Time
Shoot-through Current
TR
TA = 25°C, CL = 1nF
TF
TA = 25°C, CL = 1nF
TR
TA = 25°C, CL = 1nF
TF
TA = 25°C, CL = 1nF
40
70
ns
30
50
ns
20
50
ns
15
40
ns
0
mA
Undervoltage Lockout
Start Threshold
IMP38C42/4, IMP38HC42/4
13.5
14.5
15.5
V
IMP38C43/5, IMP38HC43/5
7.8
8.4
9.0
Minimum Operating Voltage
IMP38C42/4, IMP38HC42/4
8
9
10
V
IMP38C43/5, IMP38HC43/5
7.0
7.6
8.2
Pulse Width Modulator
Maximum Duty Cycle
IMP38C42/3, IMP38HC42/3,
94
96
%
Maximum Duty Cycle
IMP38C44/5, IMP38HC44/5
48
50
%
Minimum Duty Cycle
0
%
Supply Current
Start-Up Current
Operating Current
VCC = 13V for IMP38C42/44, IMP38HC42/44
VCC = 7.5V for IMP38C43/45, IMP38HC43/45
ICC
VFB = VIS = 0
95
120
µA
0.5
1.5
mA
Note 1. Guaranteed by design. Not 100% tested in production.
Note 2. Measured at trip point of VFB = 0V.
Note 3. Gain is defined as:
A
=
∆VCOMP
∆VCS
,
0
≤
VCS
≤
0.8V
Note 4. Adjust VCC above the start threshold before setting at 15V.
Note 5. Output frequency equals the oscillator frequency for
IMP38C42/3 and IMP38HC42/3 devices. Output frequency
equals one-half the oscillator frequency for IMP38C44/5 and
IMP38HC44/5 devices.
Table 1. Startup and Operating Voltage Selection Guide
Duty Cycle
0% to 96%
0% to 50%
UVLO Thresholds
Start-up at 8.4V
Operating Minimum = 7.6V
Start-up at 14.5V
Operating Minimum = 9.0V
IMP38C43/HC43
IMP38C42/HC42
IMP38C45/HC45
IMP38C44/HC44
38C/HC_t03.eps
© 2000 IMP, Inc.
PWM Controllers
5
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