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RT9986 Datasheet(PDF) 23 Page - Richtek Technology Corporation |
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RT9986 Datasheet(HTML) 23 Page - Richtek Technology Corporation |
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23 / 24 page  23 DS9986-00 May 2011 www.richtek.com RT9986 Protection type Threshold (typical) Refer to Electrical spec Protection methods IC Shutdown Delay time Reset method Current Limit P-MOSFET Current > 1.6A N-MOSFET off, P-MOSFET off. Automatic reset at next clock cycle. 100ms VDDM power reset or all enable pins set to low FB3 UVP FB3 < 0.4V after soft-start end. N-MOSFET off, P-MOSFET off. No-delay VDDM power reset or all enable pins set to low CH3 Step-Down FB3 Over Load FB3 < 0.7V IC Shutdown when OL occur each cycle until 100ms. 100ms VDDM power reset or all enable pins set to low Current Limit P-MOSFET Current > 1.6A N-MOSFET off, P-MOSFET off. Automatic reset at next clock cycle. 100ms VDDM power reset or all enable pins set to low FB4 UVP FB4 < 0.4V after soft-start end. N-MOSFET off, P-MOSFET off. No-delay VDDM power reset or all enable pins set to low CH4 Step-Down FB4 Over Load FB4 < 0.7V IC Shutdown when OL occur each cycle until 100ms. 100ms VDDM power reset or all enable pins set to low Current Limit N-MOSFET Current > 1.2A N-MOSFET off, P-MOSFET off. Automatic reset at next clock cycle. 100ms VDDM power reset or all enable pins set to low PVDD5 OVP PVDD5 > 21V N-MOSFET off, P-MOSFET off. No-delay VDDM power reset or all enable pins set to low FB5 UVP FB5 < 0.6V after soft-start end. N-MOSFET off, P-MOSFET off. No-delay VDDM power reset or all enable pins set to low CH5 Step-Up FB5 Over Load FB5 < 1.1V IC Shutdown when OL occur each cycle until 100ms. 100ms VDDM power reset or all enable pins set to low Current Limit P-MOSFET Current > 1.5A P-MOSFET off. Automatic reset at next clock cycle. 100ms VDDM power reset or all enable pins set to low VOUT6 OVP VOUT6 < −13V P-MOSFET off. No-delay VDDM power reset or all enable pins set to low FB6 UVP FB6 >1.2V P-MOSFET off. No-delay VDDM power reset or all enable pins set to low CH6 Inverter FB6 Over Load FB6 > 0.74V IC Shutdown when OL occur each cycle until 100ms. 100ms VDDM power reset or all enable pins set to low Current Limit N-MOSFET Current > 0.8A N-MOSFET off, P-MOSFET off. Automatic reset at next clock cycle. 100ms VDDM power reset or all enable pins set to low CH7 WLED PVDD7 OVP PVDD7 > 15V Shutdown CH7 Not applicable VDDM power reset or all enable pins set to low Thermal Thermal Shutdown Temperature > 160 °C All channels stop switching No-delay VDDM power reset or all enable pins set to low |
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