ADP5080 datasheet(32/64 Pages) AD

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ADP5080

Data Sheet

Figure 53. Fault Function Logic Diagram

Table 12. Channel 5 Standalone Undervoltage Detection Option

SEL_IND_UV5 Bit

Undervoltage Detected

Output

Any Channel Other

Than Channel 5

Channel 5

Yes

All channels shut down

Yes

All channels shut down

Yes

All channels shut down

All channels are operational

Yes

All channels shut down

Yes

All channels shut down

Yes

Channel 5 shuts down; all other channels are operational

All channels are operational

UNDERVOLTAGE PROTECTION (UVP)

The ADP5080 incorporates undervoltage protection (UVP) on

Channel 1 to Channel 7. When the output of any channel falls

below 65% of the specified voltage, UVP shuts down all seven

channels by internally resetting the CHx_ON bits in Register 48.

Channel 5 can be configured for standalone undervoltage pro-

tection (see the Channel 5 Standalone Undervoltage Detection

Option section).

UVP Detection Delay

Undervoltage detection includes a debounce delay, which is

configured in Register 23 (see Table 57). The undervoltage

condition is recognized only after it continues for the period

specified by the UV_DLY bits in Register 23 (see Figure 54).

Setting the UV_DLY bits to 11 disables UVP.

Figure 54. Undervoltage Detection Delay

Channel 5 Standalone Undervoltage Detection Option

If desired, undervoltage protection on Channel 5 can be isolated

from UVP on all the other channels. When the SEL_IND_UV5

bit is set high in Register 34, an undervoltage condition on

Channel 5 causes only Channel 5 to be shut down (see Table 12).

If this option is selected, the UV_DLY5 bits in Register 34 can

be used to set a UVP detection delay for Channel 5 only.

PWRG1

PWRG2

PWRG5

PWRG6

PWRG7

TIMEOUT

LOGIC

VBATT_UVLO

MASK_PWRG1

MASK_PWRG2

MASK_PWRG3

MASK_PWRG4

MASK_PWRG5

MASK_PWRG6

MASK_PWRG7

PWRG3

CH3_ON

PWRG4

CH4_ON

FAULT

VOUT

CHx_ON

(x = 1 TO 7)

UVx

(x = 1 TO 7)

TIME

65%

Δt < UV_DLY

SHUTDOWN

Δt = UV_DLY

Rev. A | Page 32 of 64

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