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ISL78224

更新时间： 2024-11-24 14:57:19
品牌 Logo 应用领域
瑞萨 - RENESAS /
页数 文件大小 规格书
147页 8423K
描述
4-Phase 12V/48V Bidirectional Synchronous PWM Controller

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中文翻译

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ISL78224 数据手册

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DATASHEET  
ISL78224  
FN8988  
Rev.0.00  
Oct 10, 2018  
4-Phase 12V/48V Bidirectional Synchronous PWM Controller  
The ISL78224 is a 4-phase, bidirectional, synchronous  
Features  
PWM controller designed to perform power conversion  
between 12V and 48V buses up to 3kW at >95%  
conversion efficiency. One ISL78224 supports both Buck  
and Boost power conversion, enabling a compact and  
robust design with minimum components.  
• 4-phase bidirectional synchronous 12V to  
48V controller  
• Master/slave architecture supports up to 4 ICs in parallel  
• Voltage and current regulation  
The ISL78224 regulates both voltage and current to  
control power transfer from bus to bus. The multiphase  
architecture uses interleaved timing to support up to four  
parallel power stages per ISL78224. By interleaving the  
power stages, the ripple frequency is multiplied, reducing  
input and output ripple voltage and current. Lower ripple  
results in fewer input/output capacitors and therefore  
lower component cost and smaller circuit  
• Phase dropping facilitated with companion FET driver  
• 2% current monitor gain accuracy from 0 to full load  
• Supply and clock redundancy for functional safety  
• Cycle-by-cycle peak current limiting  
• Cycle-by-cycle negative current limiting  
• Digitally programmable average current limit  
• Analog and/or digital control of output voltage  
• PMBus for status monitoring and fault response control  
implementation.  
The IC is designed to be interleaved in a master/slave  
architecture to be scalable for higher power. Integrated  
within the device is a dual-output Flyback controller that  
generates both a 12V supply for the power stage FET  
drivers and a 6V supply for the ISL78224 from either of  
the two buses. A 200mA auxiliary linear regulator  
supplies a local microcontroller or interface devices.  
• Selectable phase dropping and diode emulation for  
light-load efficiency improvement  
• Comprehensive protection with selectable hiccup or  
latch-off fault responses  
• Digitally programmable warning and fault thresholds  
• Dual-output Flyback controller  
A PMBus interface provides system control and  
diagnostics to support functional safety requirements.  
This digital interface offers the system controller the  
ability to program operating modes, voltage and current  
limit warning and protection thresholds, individual fault  
response, and rapid fault condition detection.  
• 200mA adjustable output linear regulator  
• 10mmx10mm 64 Ld TQFP with exposed pad thermal  
interface  
• AEC-Q100 Grade 1  
Applications  
Related Literature  
• Automotive bidirectional DC/DC converter  
For a full list of related documents, visit our website  
• Bidirectional DC/DC for smart grid  
• Backup battery DC/DC converter  
• ISL78224 product page  
100  
99  
98  
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96  
95  
94  
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92  
91  
90  
100  
BAT12 = 6V  
BAT12 = 12V  
BAT12 = 22V  
BAT12 = 9V  
BAT12 = 18V  
BAT12 = 24V  
99  
98  
97  
96  
95  
94  
93  
92  
91  
90  
26V to 12V  
48V to 12V  
64V to 12V  
36V to 12V  
56V to 12V  
0
50  
100  
BAT12 Load CXrrent (A)  
150  
200  
0
5
10  
15  
20  
25  
30  
35  
40  
45  
BAT48 Load Current (A)  
Figure 1. Buck Mode, DE Mode, Phase-Drop Enabled  
Figure 2. Boost Mode, DE Mode, Phase-Drop Enabled  
FN8988 Rev.0.00  
Oct 10, 2018  
Page 1 of 147  
1234567...147

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