RT9758
High Voltage Smart Cap Divider and Direct Charge Charger
General Description
The RT9758 is a high efficiency and high charge current
charger for high voltage application. The efficiency is up
Features
⚫ Integrated Bidirectional Bypass Mode and Cap
Divider Mode (DIV2 Mode)
⚫ Input Reverse Blocking NFET between WRX_IN
Pin and VBUS Pin
to 98.1% when V
= 10V, I
= 2A, switching
OUT
OUT
frequency = 500kHz, dual phase with VBUS input in cap
divider mode. The RT9758 maximum charge current is
up to 5A. The device integrates cap divider topology
(DIV2 mode), direct charge topology (Bypass mode), an
input reverse blocking NFET, a dual-phase charge
pump core, the EN pin control and 9-way protection. In
present mode (EN = H), the host can still order the
Block the Reverse Current
⚫ Dual-Phase Charge Pump Core
5A Output Current Capability
Efficiency Up to 98.1% when V
= 10V, I
OUT
OUT
= 2A, Switching Frequency = 500kHz and Dual
Phase with VBUS Input in DIV2 Mode
300kHz to 1.5MHz Variable Switching
Frequency Stay Out of Audio Band
Spread Spectrum Technology for EMI
Reduction
2
command by I C serial interface.
The recommended junction temperature range is −40C
to 125C, and the ambient temperature range is −40C
to 85C.
Adjustable Single-Phase or Dual-Phase for
DIV2 Mode
Applications
⚫ Smart Phones
⚫ Tablet
Programmable Pre-Charge Current and Pre-
Charge Timing for Charge Soft-Start
Support Converter Soft-Start with 200mA
Loading
⚫ PC
⚫ Support Synchronize Function for Parallel
Application
Ordering Information
RT9758
⚫ Operation Mode Transfer Automatically between
Bypass Mode and DIV2 Mode (AT_Function)
Package Type
WSC : WL-CSP-36B 2.74x2.84 (BSC)
2
⚫ I C is Available when Device in Present Mode
Note:
⚫ 3-Error Charge Pump Switch Protection
VBUS Voltage Too Low Error Protection before
Switch (VBUS_LOW_ERR)
Richtek products are Richtek Green Policy compliant
and compatible with the current requirements of
IPC/JEDEC J-STD-020.
CFLY Short Error Protection Before Switch
(CFLY_DIAG)
Converter Over-Current Protection (CON_OCP)
⚫ 6-Way System Protection
VBUS Over-Voltage Protection (VBUS_OVP)
IBUS Over-Current Protection (IBUS_OCP)
VOUT Over-Voltage Protection (VOUT_OVP)
WRX Reverse Over-Current Protection
(WRX_IRE_OCP)
VOUT Short Error Protection Before Charge
(VOUT_ERR)
Junction Over-Temperature Protection
(TDIE_OTP)
Copyright © 2023 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS9758-04
December 2023
www.richtek.com
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