RT8885A
Parameter
Symbol
VOCAPH0
VOCAPH1
VOCAPH2
GFX VR per Phase
Over Current Protection
VOCAPH3
(OCP) Threshold
Setting
VOCAPH4
VOCAPH5
VOCAPH6
VOCAPH7
GFX VR Per Phase
OCP Threshold
IPHOCPA
Summed Total OCP
Threshold Setting for
GFX VR
OCSET Pin Output
Injection Current
VOCASUM0
VOCASUM1
VOCASUM2
VOCASUM3
VOCASUM4
VOCASUM5
VOCASUM6
IINJECTOCSET
Test Conditions
Min Typ Max
PHOCA_CTRL [2:0] =
[000]
2012.5 2117.5 2222.5
PHOCA_CTRL [2:0] =
[001]
1732.5 1837.5 1942.5
PHOCA_CTRL [2:0] = Measure
[010]
OCSET Pin
PHOCA_CTRL [2:0] = Voltage
[011]
Difference
PHOCA_CTRL [2:0] = Before and
[100]
After 40A
PHOCA_CTRL [2:0] = Current
[101]
Injection
1452.5 1557.5 1662.5
1172.5 1277.5 1382.5
892.5 997.5 1102.5
612.5 717.5 822.5
PHOCA_CTRL [2:0] =
[110]
332.5 437.5 542.5
PHOCA_CTRL [2:0] =
[111]
52.5 157.5 262.5
PHOCA_CTRL[2:0] =
[000]
8.2 10 11.8
PHOCA_CTRL[2:0] =
[001]
12.3 15 17.7
PHOCA_CTRL[2:0] =
[010]
PHOCA_CTRL[2:0 ]=
[011]
PHOCA_CTRL[2:0] =
[100]
PHOCA_CTRL[2:0] =
[101]
Measure
Current
Sense
Amplifier
Output
Current
18.5 22.5 26.6
27.7 33.8 39.8
41.5 50.6 59.7
62.3 75.9 89.6
PHOCA_CTRL[2:0] =
[110]
93.4 113.9 134.4
PHOCA_CTRL[2:0] =
[111]
140.1 170.9 201.6
IAAVGOCP = 120% of
ICCMAXA
-- 1732.5 --
IAAVGOCP = 128% of
ICCMAXA
IAAVGOCP = 136% of
ICCMAXA
Measure
OCSET Pin
Voltage
Difference
-- 1767.5 --
-- 1802.5 --
IAAVGOCP = 144% of Before and
ICCMAXA
After 40A
-- 1837.5 --
IAAVGOCP = 152% of
ICCMAXA
Current
Injection,
-- 1872.5 --
IAAVGOCP = 160% of
ICCMAXA
PHOCA_CTR
L [2:0] = [001]
--
1907.5
--
Average total OCP is
disabled
-- 1942.5 --
Unit
mV
A
mV
--
40
--
A
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS8885A-01 January 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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