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RT9758 データシート(PDF) 48 Page - Richtek Technology Corporation

部品番号 RT9758
部品情報  High Voltage Smart Cap Divider and Direct Charge Charger
PDF  61 Pages
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メーカー  RICHTEK [Richtek Technology Corporation]
ホームページ  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9758 データシート(HTML) 48 Page - Richtek Technology Corporation

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RT9758
Copyright © 2023 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
DS9758-03
May 2023
48
Table 9. Pre-charge Time in 4 Operation Modes
Operation Mode
Pre-charge Time
Pre-charged Capacitor
Bypass
VOUT_ERR_ON_TIME
COUT
Reverse Bypass
NA
NA
DIV2
CFLY_DIAG_TIME +
VOUT_ERR_ON_TIME
CFLY and COUT
Reverse DIV2
CFLY_DIAG_TIME
CFLY
Operation Mode Diagram
The RT9758 includes 4 operation modes, user can control device enter each mode by related register bits. The
Figure 10 shows the setting step between each mode. User needs to follow the recommend step to control device.
For example, the device can be transferred between bypass mode and DIV2 mode by two operation ways. The first
way is using AT_FUNCTION, and the second way is controlling by register setting. If user controls device by register,
the recommend operation flow as below: The first step is to order CHG_EN bit to 0 to make device into standby mode.
The second step is to set OPERATION_MODE_SELECTION bit and REVERSE_MODE_EN bit, then the last step
is to set CHG_EN bit to 1 for start charging. Based on above description, the OPERATION_MODE_SELECTION bit
and REVERSE_MODE_EN bit only can be changed while the device stays in standby mode or present mode.
Standby Mode
Bypass Mode
Reverse Bypass Mode
DIV2 Mode
Reverse DIV2 Mode
Present Mode
EN Pin=H/Floating
1. CHG_EN bit set to 0
2. EN Pin=L
1. EN Pin=L
2. Operation_Mode_Selection bit set to 0
3. Reverse_Mode_EN bit set to 0
4. CHG_EN bit set to 1
1. AT_Function_EN bit set to 1
2. Enable VOUT_PD
3. Increase VBUS
1. EN Pin=L
2. Operation_Mode_Selection bit set to 1
3. Reverse_Mode_EN bit set to 0
4. CHG_EN bit set to 1
1. AT_Function_EN bit set to 1
2. Decrease VBUS
CHG_EN bit set to 0
1. EN Pin=L
2. Operation_Mode_Selection bit set to 0
3. Reverse_Mode_EN bit set to 1
4. CHG_EN bit set to 1
1. EN Pin=L
2. Operation_Mode_Selection bit set to 1
3. Reverse_Mode_EN bit set to 1
4. CHG_EN bit set to 1
CHG_EN bit set to 0
CHG_EN bit set to 0
Figure 10. Operation Mode Diagram



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