DATASHEET
ISL78229
FN8656
Rev.5.00
Sep 18, 2017
2
2-Phase Boost Controller with Drivers and I C/PMBus
The ISL78229 is an automotive grade (AEC-Q100 Grade 1),
2-phase 55V synchronous boost controller that simplifies the
design of high power boost applications. It integrates strong
half-bridge drivers, an analog/digital tracking input,
comprehensive protection functions, and a PMBus interface for
added control and telemetry.
Features
• Input/output voltage range: 5V to 55V, withstands 60V
transients
• Supports synchronous or standard boost topology
• Peak current mode control with adjustable slope
compensation
The ISL78229 enables a simple, modular design for systems
requiring power and thermal scalability. It offers peak-current
mode control for fast line response and simple compensation.
Its synchronous 2-phase architecture enables it to support
higher current while reducing the size of input and output
capacitors. The integrated drivers feature programmable
adaptive dead time control, offering flexibility in power stage
design. The ISL78229 offers a 90° output clock and supports
1-, 2-, and 4-phases.
• Secondary average current control loop
• Integrated 5V 2A sourcing/3A sinking N-channel MOSFET
drivers
• Switching frequency: 50kHz to 1.1MHz per phase
• External synchronization
• Programmable minimum duty cycle
• Programmable adaptive dead time control
• Optional diode emulation and phase dropping
• PWM and analog track function
The ISL78229 offers a highly robust solution for the most
demanding environments. Its unique soft-start control prevents
large negative current even in extreme cases, such as a restart
under high output pre-bias on high volume capacitances. It also
offers two levels of cycle-by-cycle OCP, average current limiting,
input OVP, output UVP/OVP, and internal OTP. A thermistor input
provides external OTP for the power-stage elements. In the event
of a fault, the ISL78229 offers individually programmable
latch-off or hiccup recovery for each fault type.
• Forced PWM operation with negative current limiting and
protection
• Comprehensive protection/fault reporting
• Selectable hiccup or latch-off fault response
2
• I C/PMBus compatible digital interface
Also integrated are several functions that ease system design. A
unique tracking input controls the output voltage, allowing it to
track either a digital duty cycle (PWM) signal or an analog
reference. The ISL78229 provides input average current limiting
so the system can deliver transient bursts of high load current
while limiting the average current to avoid overheating. The
ISL78229 PMBus interface provides fault reporting, telemetry,
and system control to support functional safety qualification.
• AEC-Q100 qualified, Grade 1: -40°C to +125°C
• 6mm x 6mm 40 Ld WFQFN (Wettable Flank QFN) package
Applications
• Automotive power systems (for example, 12V to 24V, 12V to
48V, etc.)
- Trunk audio amplifiers
- Start-stop systems
Related Literature
- Automotive boost applications
• Industrial and telecommunication power supplies
• For a full list of related documents, visit our website
- ISL78229 product page
PVCC
VIN
VIN
EN
100
95
VOUT
BOOT1
EN_IC
UG1
PH1
RSEN1
90
NTC
VO = 18V
VIN
85
LG1
80
SDA
SCL
SALERT
VO = 24V
PMBus
ISEN1N
ISEN1P
75
VO = 36V
ISL78229
70
65
60
55
50
POWER-GOOD
PGOOD
BOOT2
UG2
PH2
TRACK
CLKOUT
SS
RSEN2
CLOCK_OUT
LG2
ISEN2N
ISEN2P
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
COMP
LOAD CURRENT (A)
FB
NOTE: (See Typical Application in Figure 4 on page 8.)
FIGURE 1. SIMPLIFIED APPLICATION SCHEMATIC, 2-PHASE
SYNCHRONOUS BOOST
FIGURE 2. EFFICIENCY CURVES, V = 12V, T = +25°C
IN
A
FN8656 Rev.5.00
Sep 18, 2017
Page 1 of 73
5秒后页面跳转
NTC热敏电阻与PTC热敏电阻的应用原理及应用范围
GTO与普通晶闸管相比为什么可以自关断？为什么普通晶闸管不能呢？从GTO原理、应用范围带你了解原因及推荐型号
LF353数据手册解读：特性、应用、封装、引脚说明、电气参数及替换型号推荐
A4950资料手册解读：特性、应用、封装、引脚功能、电气参数及代换型号
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
