ZAMC4100GA2R datasheet(61/156 Pages) RENESAS

61 / 156 page

ZAMC4100 Datasheet

January 26, 2016

Table 3.15 HBDSTAT Register Bits Mapping

Name

HBDSTAT

Bit No

Bit name

Reset

Access

R/Wc

Address

0x0A

R/Wc = Read/Write 1 to clear, R = Read-only

Table 3.16 HBDSTAT Register Bit Descriptions

Bit

Description

7:4

HBxOSF: Open/short status flag for half-bridge driver x (x = 4 to 1, for HB4 to HB1 respectively). This flag is not

registered; i.e., its value stays as long as the diagnostic event takes place.

The meaning of these bits depends on the settings of bits HBxCSLEN and HBxCSHEN of the HBDDIAG register and

are given in Table 3.19 as explained in section 3.8.3.

3:0

HBxOCIF: Over-current interrupt flag for half-bridge driver x (x = 4 to 1, for HB4 to HB1 respectively). See section

3.8.2.

1 = There is an over-current in the output of driver x. The driver x is disabled as long as this bit is set.

0 = There is no over-current in the output of driver x.

3.8.2.

Half-Bridge Over-Current Protection

In the case of an over-current event, the corresponding driver automatically limits the current in order to prevent

damage in the MOSFET stage. If the over-current condition continues more than 20µs, the corresponding

interrupt flag (HBxOCIF; Table 3.16) is set and the driver is automatically disabled. The MCU can re-enable the

driver by clearing its interrupt flag. If the over-current condition still exists after 20µs, the driver will be disabled

again.

The time of 20µs is counted by a counter functioning like an integrator. The counter works in increment or

decrement mode determined by following conditions:

•

The counter only increments per unit time in response to an over-current occurrence.

•

The counter only decrements (to zero) per unit time in response to normal current operation.

Figure 3.13 illustrates the over-current function using three typical examples of over-current occurrences in an

application:

Case A: Operating with persistent over-current occurrence for more than 20µs. The counter increments

constantly until expiration after 20µs, the interrupt flag is set, and the MOSFET is automatically

disabled.

ZAMC4100GA2R bảng dữ liệu(PDF) 61 Page - Renesas Technology Corp

ZAMC4100GA2R bảng dữ liệu(HTML) 61 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

bảng dữ liệu tải về

Link URL