Other Parts Discussed in Thread: UCC27282
What guilde lines should I follow to select the bootstrap capacitor for a LM27222 driving 2 N-Channel FETS switching a 18 AMP load at 30HZ? This is to use the LM27222 as a replacement for the LM2726.
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What device would TI recommend instead of the LM27222 as a replacement for the LM2726, if footprint-compatibility is NOT a constraint?
Hi Randy,
UCC27282 is our latest half-bridge driver, it is rated for -40C to 125C, includes a 5V UVLO and offers better drive current and switching characteristics.
The devices below are a good starting point.
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Number of channels (# ) |
2 |
2 |
2 |
Power switch |
MOSFET |
MOSFET |
MOSFET |
Bus voltage (Max ) (V ) |
120 |
29 |
24 |
Peak output current (A ) |
3 |
4 |
6 |
Input VCC (Min ) (V ) |
5.5 |
10 |
4.5 |
Input VCC (Max ) (V ) |
16 |
15 |
8 |
Rise time (ns ) |
12 |
10 |
10 |
Fall time (ns ) |
10 |
10 |
5 |
Prop delay (ns ) |
13 |
20 |
14 |
Iq (uA ) |
2 |
425 |
350 |
Input threshold |
TTL |
TTL |
TTL |
Channel input logic |
TTL |
CMOS |
TTL |
Negative voltage handling at HS pin (V ) |
-10 |
0 |
0 |
Features |
Enable and Interlock |
Dead Time Control |
Synchronous Rectification |
Synchronous Rectification |
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Rating |
Catalog |
Catalog |
Catalog |
Operating temperature range (C ) |
-40 to 125 |
-40 to 125 |
-40 to 125 |
Package Group |
VSON | 10 |
HTSSOP | 16 |
SOIC | 8 |
SON | 8 |
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Approx. price (US$ ) |
1.40 | 1ku |
1.55 | 1ku |
0.59 | 1ku |
What application is this application/EE for?
Please let us know if you have further questions.
Regards,
Mamadou Diallo
High Power Drivers Applications and Technical Support
All information in this correspondence and in any related correspondence is provided “as is” and “with all faults”, and is subject to TI’s Important Notice (http://www.ti.com/corp/docs/legal/important-notice.shtml).