参数资料
型号: ZL2004ALNN
厂商: Intersil
文件页数: 10/42页
文件大小: 0K
描述: IC REG CTRLR BUCK SYNC ADJ 32QFN
标准包装: 490
PWM 型: 电压模式
输出数: 1
频率 - 最大: *
占空比: 95%
电源电压: 4.5 V ~ 14 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 32-VFQFN 裸露焊盘
包装: 托盘
ZL2004
4.2 Power Conversion Overview
>
Input Voltage Bus
PG
EN
MGN ILIM SS
VMON V(0,1)
FC
VDD
LDO
VR
VTRK
Power Management
NVM
SYNC
GEN
Digital
Compensator
D-PWM
MOSFET
Pre
Drivers
PWMH
PWML
Driver
MOSFET
V OUT
NLR
SYNC
PLL
ADC
-
VSEN
ADC
+
ISENA
ISENB
REFCN
DAC
I 2 C
DDC
SALRT
SDA
SCL
Communication
ADC
MUX
VDD
Voltage
Sensor
TEMP
VSEN+
VSEN-
XTEMP
SA(0,1)
Sensor
Figure 4. ZL2004 Block Diagram
The ZL2004 operates as a voltage-mode, synchronous
buck converter with a selectable constant frequency
pulse width modulator (PWM) control scheme that
uses external driver, MOSFETs, capacitors, and an
inductor to perform power conversion.
V IN
Dual output PWM ZL2004
The ZL2004 provides a dual PWM signal which
removes the need of a tri-state function and
significantly improves conversion performance.
The ZL2004 has been designed to drive the QH and
QL independently, allowing greater control of the
MOSFETs and higher overall performance. A special
ZL2004
DRIVER
V OUT
driver with two PWM inputs is required (ZL1505).
Using two PWM signals (PWMH and PWML) offers
more options during fault event and pre-bias
conditions, eliminating the need for a tri-state driver
and reducing the delays associated with this scheme.
Figure 5. Synchronous Buck Converter
Figure 5 illustrates the basic synchronous buck
converter topology showing the primary power train
components. This converter is also called a step-down
converter, as the output voltage must always be lower
than the input voltage.
10
The ZL2004 has several features to improve the power
conversion efficiency. A non-linear response (NLR)
loop improves the response time and reduces the
output deviation as a result of a load transient. The
ZL2004 monitors the power converter’s operating
conditions and continuously adjusts the turn-on and
turn-off timing of the high-side and low-side
MOSFETs to optimize the overall efficiency of the
power supply. Adaptive performance optimization
algorithms such as dead-time control, diode emulation,
FN6846.3
February 15, 2011
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相关代理商/技术参数
参数描述
ZL2004ALNN-01 功能描述:IC REG CTRLR BUCK SYNC ADJ 32QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:100% 电源电压:8.2 V ~ 30 V 降压:无 升压:无 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:0°C ~ 70°C 封装/外壳:8-DIP(0.300",7.62mm) 包装:管件 产品目录页面:1316 (CN2011-ZH PDF)
ZL2004ALNNT 功能描述:IC REG CTRLR BUCK SYNC ADJ 32QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:100% 电源电压:8.2 V ~ 30 V 降压:无 升压:无 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:0°C ~ 70°C 封装/外壳:8-DIP(0.300",7.62mm) 包装:管件 产品目录页面:1316 (CN2011-ZH PDF)
ZL2004ALNNT-01 功能描述:IC REG CTRLR BUCK SYNC ADJ 32QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:100% 电源电压:8.2 V ~ 30 V 降压:无 升压:无 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:0°C ~ 70°C 封装/外壳:8-DIP(0.300",7.62mm) 包装:管件 产品目录页面:1316 (CN2011-ZH PDF)
ZL2004ALNNT1 功能描述:IC REG CTRLR BUCK SYNC ADJ 32QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:100% 电源电压:8.2 V ~ 30 V 降压:无 升压:无 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:0°C ~ 70°C 封装/外壳:8-DIP(0.300",7.62mm) 包装:管件 产品目录页面:1316 (CN2011-ZH PDF)
ZL2004ALNNT1-01 功能描述:IC REG CTRLR BUCK SYNC ADJ 32QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:100% 电源电压:8.2 V ~ 30 V 降压:无 升压:无 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:0°C ~ 70°C 封装/外壳:8-DIP(0.300",7.62mm) 包装:管件 产品目录页面:1316 (CN2011-ZH PDF)