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参数资料
| 型号： | HIP6019BCB |
| 厂商： | HARRIS SEMICONDUCTOR |
| 元件分类： | 稳压器 |
| 英文描述： | Advanced Dual PWM and Dual Linear Power Control |
| 中文描述： | DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封装： | SOIC-28 |
| 文件页数： | 7/15页 |
| 文件大小： | 362K |
| 代理商： | HIP6019BCB |
273
Description
Operation
The HIP6019B monitors and precisely controls 4 output
voltage levels (Refer to Figures 1, 2, and 3). It is designed
for microprocessor computer applications with 5V power and
12V bias input from a PS2 or ATX power supply. The IC has
2 PWM controllers, a linear controller, and a linear regulator.
The first PWM controller (PWM1) is designed to regulate the
microprocessor core voltage (V
OUT1
). PWM1 controller
drives 2 MOSFETs (Q1 and Q2) in a synchronous-rectified
buck converter configuration and regulates the core voltage
to a level programmed by the 5-bit digital-to-analog
converter (DAC). The second PWM controller (PWM2) is
designed to regulate the I/O voltage (V
OUT2
). PWM2
controller drives a MOSFET (Q3) in a standard buck
converter configuration and regulates the I/O voltage to a
resistor programmable level between 3.0 and 3.5V
DC
. An
integrated linear regulator supplies the 2.5V clock generator
power (V
OUT4
). The linear controller drives an external
MOSFET (Q4) to supply the GTL bus power (V
OUT3
).
Initialization
The HIP6019B automatically initializes upon receipt of input
power. Special sequencing of the input supplies is not
necessary. The Power-On Reset (POR) function continually
monitors the input supply voltages. The POR monitors the
bias voltage (+12V
IN
) at the VCC pin and the 5V input
voltage (+5V
IN
) at the OCSET1 pin. The normal level on
OCSET1 is equal to +5V
IN
less a fixed voltage drop (see
over-current protection). The POR function initiates soft-start
operation after both input supply voltages exceed their POR
thresholds.
Soft-Start
The POR function initiates the soft-start sequence. Initially,
the voltage on the SS pin rapidly increases to approximately
1V (this minimizes the soft-start interval). Then an internal
11
μ
A current source charges an external capacitor (C
SS
) on
the SS pin to 4V. The PWM error amplifier reference inputs
(+ terminal) and outputs (COMP1 and COMP2 pins) are
clamped to a level proportional to the SS pin voltage. As the
SS pin voltage ramps from 1V to 4V, the output clamp allows
generation of PHASE pulses of increasing width that charge
the output capacitor(s). After this initial stage, the reference
input clamp slows the output voltage rate-of-rise and
provides a smooth transition to the final set voltage.
Additionally, both linear regulator’s reference inputs are
clamped to a voltage proportional to the SS pin voltage. This
method provides a rapid and controlled output voltage rise.
Figure 6 shows the soft-start sequence for the typical
application. At T0 the SS voltage rapidly increases to
approximately 1V. At T1, the SS pin and error amplifier output
voltage reach the valley of the oscillator’s triangle wave. The
oscillator’s triangular waveform is compared to the clamped
error amplifier output voltage. As the SS pin voltage
increases, the pulse-width on the PHASE pin increases. The
interval of increasing pulse-width continues until each output
reaches sufficient voltage to transfer control to the input
reference clamp. If we consider the 3.3V output (V
OUT2
) in
Figure 6, this time occurs at T2. During the interval between
T2 and T3, the error amplifier reference ramps to the final
value and the converter regulates the output to a voltage
proportional to the SS pin voltage. At T3 the input clamp
voltage exceeds the reference voltage and the output voltage
is in regulation.
The remaining outputs are also programmed to follow the
SS pin voltage. Each linear output (V
OUT3
and V
OUT4
)
initially follows the 3.3V output (V
OUT2
). When each output
reaches sufficient voltage the input reference clamp slows
the rate of output voltage rise. The PGOOD signal toggles
‘high’ when all output voltage levels have exceeded their
under-voltage levels. See the Soft-Start Interval section
under Applications Guidelines for a procedure to determine
the soft-start interval.
Fault Protection
All four outputs are monitored and protected against extreme
overload. A sustained overload on any linear regulator
output or an over-voltage on the PWM outputs disables all
converters and drives the FAULT/RT pin to VCC.
Figure 7 shows a simplified schematic of the fault logic. An
over-voltage detected on either VSEN1 or VSEN2
immediately sets the fault latch. A sequence of three over-
current fault signals also sets the fault latch. A comparator
FIGURE 6. SOFT-START INTERVAL
0V
0V
0V
TIME
PGOOD
(2V/DIV)
SOFT-START
(1V/DIV)
OUTPUT
VOLTAGES
(0.5V/DIV)
V
OUT1
(DAC = 2V)
V
OUT2
( = 3.3V)
V
OUT4
( = 2.5V)
V
OUT3
( = 1.5V)
T1
T2
T3
T0
HIP6019B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| HIP6019BCB-T | 功能描述:IC REG QD BCK/LINEAR 28-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压（降压）同步（3），线性（LDO）（2） 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| HIP6019BCBZ | 功能描述:电压模式 PWM 控制器 ADV DL 3PWM & DL LINER PWR CONTROL RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| HIP6019BCBZ-T | 功能描述:电压模式 PWM 控制器 ADV DL 3PWM & DL LINER PWR CONTROL RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| HIP6019BEVAL1 | 功能描述:电源管理IC开发工具 HIP6019B EVAL BRD FOR MB PWR MGMT RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| HIP6019CB | 制造商:Harris Corporation 功能描述: |
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