The TPS2458 is a dual, 12 V, channel protection (hotswap) and blocking (ORing) controller that provides inrush control, current limiting, overload protection, and reverse current blocking. The current sense topology provides both accurate current limits and independent setting of current limit and fast trip thresholds.
The ORing control uses an external MOSFET to block reverse current when an input is shorted. Systems with closely matched supply voltages and feed networks can supply current from both supplies simultaneously.
The MONx output provides an accurate analog indication of load current.
The protection circuits may be used without blocking, and the blocking may be used without protection
|
TPS2358 |
TPS2359 |
TPS2456 |
TPS2458 |
TPS2459 |
| Gate Control |
Linear |
Linear |
Linear |
Linear |
Linear |
| No. of Outputs |
4 |
4 |
2 |
2 |
2 |
| Vin(Min)(V) |
8.5 |
8.5 |
8.5 |
8.5 |
8.5 |
| Vin(Max)(V) |
15 |
15 |
15 |
15 |
15 |
| Pin/Package |
48VQFN |
36VQFN |
36VQFN |
32QFN |
32QFN |
| Operation |
Latch Off |
Configurable Latch-off or Retry |
Latch Off |
Latch Off |
Configurable Latch-off or Retry |
| Enable |
Active-Low |
Via I2C |
Active High |
Active Low |
Via I2C |
| Output |
PG/Fault via Dedicated Pins |
PG/Fault via I2C |
PG/Fault via Dedicated Pins |
PG/Fault via Dedicated Pins |
PG/Fault via I2C |
| Circuit Breaker Function |
Interdependent |
Configurable |
Independent |
Interdependent |
Configurable |
| FET Status Monitoring(Typ) |
None |
Via I2C |
None |
None |
Via I2C |
| Current Monitoring |
Analog, All Rails |
Analog, All Rails |
Analog, All Rails |
Analog, All Rails |
Analog, All Rails |
| # of AdvancedMCs controlled |
2 |
2 |
2 |
1 |
1 |
| # of 12V (Payload) Rails Controlled |
2 |
2 |
2 |
1 |
1 |
| # of 3.3V (Management) Rails Controlled |
2 |
2 |
0 |
1 |
1 |
| Early Warning Indicator |
None |
Via I2C |
None |
None |
Via I2C |
| Payload Power (12V nominal) FET type |
External |
External |
External |
External |
External |
| Payload Programmable Current Limit |
Resistor Set |
Resistor Set / I2C |
Resistor Set |
Resistor Set |
Resistor Set / I2C |
| Optional Oring FET Control |
Yes |
Yes |
Yes |
Yes (12V rail) |
Yes |
| Management Power FET type |
Internal |
Internal |
N/A |
Internal |
Internal |
| Current Limiting during Fault |
Yes |
Yes |
Yes |
Yes |
Yes |
| 3.3V Power Fault Current Limit Range(A) |
0.170 to 0.225 |
0.170 to 0.225 |
N/A |
0.170 to 0.225 |
0.170 to 0.225 |
| Fast Trip response (nS) |
350 |
350 |
350 |
350 |
350 |
| Management Power Internal FET R(ds)on(Typ) |
290 mOhm |
290 mOhm |
N/A |
290 mOhm |
290 mOhm |
| Digital Interface |
None |
I2C |
None |
None |
I2C |
| Approx. Price (US$) |
4.00 | 1ku |
5.00 | 1ku |
3.45 | 1ku |
2.00 | 1ku |
2.50 | 1ku |