FLOATING LOAD DRIVER; UNDER VOLTAGE LOCKOUT CIRCUIT
High Side Driver:
YES
Input Characteristics:
GATED SCHMITT TRIGGER
Interface IC Type:
HALF BRIDGE BASED MOSFET DRIVER
JESD-30 Code:
R-PDIP-T8
JESD-609 Code:
e0
Length:
9.88 mm
Number of Functions:
1
Number of Terminals:
8
Operating Temperature-Max:
125 °C
Operating Temperature-Min:
-40 °C
Output Characteristics:
STANDARD
Output Peak Current Limit-Nom:
0.35 A
Output Polarity:
TRUE
Package Body Material:
PLASTIC/EPOXY
Package Code:
DIP
Package Equivalence Code:
DIP14,.3
Package Shape:
RECTANGULAR
Package Style:
IN-LINE
Qualification Status:
Not Qualified
Seated Height-Max:
5.33 mm
Supply Voltage-Max:
20 V
Supply Voltage-Min:
10 V
Supply Voltage-Nom:
15 V
Supply Voltage1-Max:
620 V
Supply Voltage1-Min:
5 V
Supply Voltage1-Nom:
15 V
Surface Mount:
NO
Technology:
CMOS
Temperature Grade:
AUTOMOTIVE
Terminal Finish:
Tin/Lead (Sn/Pb)
Terminal Form:
THROUGH-HOLE
Terminal Pitch:
2.54 mm
Terminal Position:
DUAL
Turn-off Time:
0.28 µs
Turn-on Time:
0.3 µs
Width:
7.62 mm
IR2108 Frequently Asked Questions (FAQs)
The maximum allowed voltage across the bootstrap capacitor is 15V, as specified in the datasheet. Exceeding this voltage may damage the device.
Yes, but with caution. The datasheet recommends separate supplies for VCC and VB to ensure proper operation. Using a single supply may work, but it's essential to ensure that VB is always higher than or equal to VCC by at least 2V to maintain bootstrap capacitor charging.
The bootstrap capacitor value depends on the specific application, including the switching frequency, gate driver current, and desired ripple voltage. A good starting point is to use the formula: CBootstrap = (Igate * tswitch) / ΔV, where Igate is the gate driver current, tswitch is the switching time, and ΔV is the allowed voltage ripple.
The maximum current that can be sinked/sourced by the IR2108 depends on the specific pins and the operating conditions. The datasheet specifies a maximum sink current of 2A and a maximum source current of 1A for the gate driver outputs.
Yes, the IR2108 can be used for high-side switching only. In this case, connect the HO (high-side output) pin to the gate of the power transistor and leave the LO (low-side output) pin unconnected.
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IR2108 Overview
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