UPD166010 Renesas Electronics Corporation., UPD166010 Datasheet - Page 22

• Manufacturer Part Number: UPD166010
• Description: Single N-channel High Side Intelligent Power Device
• Manufacturer: Renesas Electronics Corporation.

INDUCTIVE LOAD SWITCH-OFF ENERGY DISSIPATION FOR A SINGLE PULSE
formula as R
MAXIMUM ALLOWABLE SWITCH OFF ENERGY (SINGLE PULSE)
the device turns off, the energy stored in the harness inductance is dissipated by the device, the harness resistance
and the internal resistance of power supply. If the current is abnormally high due to a load short, the energy stored in
the harness can be large. This energy has to be taken into consideration for the safe operation. The following figure
shows the condition for Eas2, the maximum switch-off energy (single pulse) for abnormally high current.
20
L
R
The energy dissipation for an inductive load switch-off single pulse in device (EAS1) is estimated by the following
supply
supply
The harness connecting the power supply, the load and the device has a small inductance and resistance. When
V
EAS1
BAT
=
1
2
L
= 0Ω.
⋅
I
2
⋅
L
100
⎛
⎜
⎝
10
IN
1
Von(CL)
: Cable resistance
: Cable inductance
0.01
Vcc
Von(CL)
OUT
IS
Maximum allowable load inductance for a single switch off
−
VCC
R
⎞
⎟
⎠
IS
R
Data Sheet S19689EJ2V0DS
L
R
0.1
L
short
sc
R
SW
L[mH]
T
ch,start
V
R
L
Tch,start ≤ 150°C
supply
BAT
supply
≤ 150degreeC, V
= 18 V,
= 5
= 10 mΩ, R
μ
1
H, L
short
short
= 15
CC
= R
=12V
μ
sc
H,
+ R
SW(on)
10
= 50 mΩ,
μ
PD166010