CXSD6288 a dual-channel, constant on-time, and synchronous PWM controller which drives dual N-channel MOSFETs for each channel. CXSD6288 steps down high voltage of a battery to generate l

发布时间：2020-04-06 09:43:38 浏览次数：704 作者：嘉泰姆来源：1

摘要：CXSD6288 a dual-channel, constant on-time, and synchronous PWM controller which drives dual N-channel MOSFETs for each channel. CXSD6288 steps down high voltage of a battery to generate l

目录JfL嘉泰姆

1.产品概述 2.产品特点
3.应用范围 4.下载产品资料PDF文档
5.产品封装图 6.电路原理图
7.功能概述 8.相关产品JfL嘉泰姆

一,产品概述(General Description) JfL嘉泰姆

The CXSD6288 is a dual-channel, constant on-time, and
synchronous PWM controller which drives dual N-channel MOSFETs
for each channel. The CXSD6288 steps down high voltage of a battery
to generate low-voltage chipset or RAM supplies in notebook computers.
The CXSD6288 provides excellent transient response and accurate DC voltage output in either PFM or PWM mode. In PFM mode, the TMA7108 provides very high efficiency over light to heavy loads with loading-modu-
lated switching frequencies. The Forced-PWM mode works nearly at constant frequency for low-noise requirements.
The CXSD6288 is equipped with accurate current-limit,output under-voltag, and output over-voltage protections,perfect for NB applications. A Power-On-Reset function monitors the voltage on V CC to prevent wrong opera-tion during power on. A soft-start ramps up the output voltage with programmable slew rate to reduce the start-up current. A soft-stop function actively discharges the output capacitors with controlled reverse inductor current. At the end of the soft-stop, the CXSD6288 forces
LGATE high to prevent over-voltage in shutdown. The CXSD6288 has individual enable controls for each channel. Pulling both EN pin low shuts down the whole chip with low quiescent current close to zero.
The CXSD6288 is available in SSOP-28 and QFN4x4-24 packages.
二.产品特点(Features)JfL嘉泰姆

1.）Adjustable Output Voltage up to 5.5V
- 0.9V Reference Voltage
- ±1% Accuracy Over Temperature
2.）Operates from an Input Battery Voltage Range of
3.）5V to 24V or from 3.3V/5V System Rail
4.）Power-On-Reset Monitoring on VCC Pin
Selectable Forced PWM or Automatic PFM/PWM Mode
5.）Constant-On-Time Control Scheme
- Switching Frequency Compensation for PWM Mode
- Constant Switching Frequency (CH1: 345kHz,
CH2: 255KHz) in PWM Mode with DC Output Current
6.）Excellent Line and Load Transient Responses
7.）Adjustable Soft-Start and Soft-Stop
8.）Power-Good Outputs for both Channels
9.）Adjustable Current-Limit Protection
- Using Sense Resistor or MOSFET’s RDS(ON)
10.）115% Over-Voltage Protection
- No Negative Output Voltage Occurred
11.）70% Under-Voltage Protection
12.）Adaptive Dead-Time Control
- Sensing G-to-S Voltage of Power MOSFETs
13.）Shutdown Control for both Channels
14.）28-pin SSOP (SSOP-28) and 4mmx4mm 24-lead
QFN (QFN4x4-24) Packages
15.）Lead Free and Green Devices Available
三,应用范围 (Applications)JfL嘉泰姆

Note Book Computers
- Chipset/RAM Supplies as low as 0.9V
- 1.8V and 2.5V Supplies
Step-Down Converters Requiring High Efficiency
四.下载产品资料PDF文档 JfL嘉泰姆

需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！JfL嘉泰姆

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五,产品封装图 (Package)JfL嘉泰姆

JfL嘉泰姆

六.电路原理图JfL嘉泰姆

七,功能概述JfL嘉泰姆

Layout Consideration (Cont.)
· Keep the switching nodes (UGATEx, LGATEx, BOOTx,PHASEx, and ISENx) away from sensitive small sig-
nal nodes since these nodes are fast moving signals.Therefore, keep traces to these nodes as short as
possible and there should be no other weak signal traces in parallel with theses traces on any layer.
· The signals going through theses traces have both high dv/dt and high di/dt, with high peak charging and
discharging current. The traces from the gate drivers to the MOSFETs (UGATEx and LGATEx) should be short
and wide.
· Place the source of the high-side MOSFET and the drain of the low-side MOSFET as close as possible.
Minimizing the impedance with wide layout plane between the two pads reduces the voltage bounce of
the node.
· The ISENx trace should be a separate trace, and independently go to the drain terminal of the low-side
MOSFET. The current sense resistor should be close to ISENx pin. The loop formed by the bottom MOSFET,
output inductor, and output capacitor, should be very small. The source of the bottom MOSFET should tie
to the negative side of the output capacitor in order for the ISENx pin to get the voltage drop on the RDS(ON).
· Decoupling capacitor, compensation component,the resistor dividers, boot capacitors, and soft-start
capacitors should be close their pins. (For example,place the decoupling ceramic capacitor near the drain
of the high-side MOSFET as close as possible. The bulk capacitors are also placed near the drain).
· The input capacitor should be near the drain of the high-side MOSFET; the high quality ceramic
decoupling capacitor can be put close to the VCC and GND pins; the output capacitor should be near the
loads. The input capacitor GND should be close to the output capacitor GND and the low-side MOSFET
GND.
· The drain of the MOSFETs (VIN and PHASEx nodes) should be a large plane for heat sinking. And
PHASEx pin traces are also the return path for UGATEx. Connect these pins to the respective
converter’s high-side MOSFET source.
The CXSD6288 uses ripple mode control. Build the resistor divider close to the VSENx pin so that the
high impedance trace is shorter. The VSENx pin traces can’t be closed to the switching signal traces (UGATEx,
LGATEx, BOOTx, PHASEx, and ISENx).
The PGNDx trace should be a seperate trace, and inpendently go to the source of the low-side MOSFET.
For QFN4x4-24 package only, the thermal pad is the PGND of the dual channels. The sources of the both
channels’ low-side MOSFETs should be near the PGND respectively.
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CXSD62104JfL嘉泰姆	TQFN4x4-24JfL嘉泰姆	COTJfL嘉泰姆	1JfL嘉泰姆	2JfL嘉泰姆	15JfL嘉泰姆	6JfL嘉泰姆	25JfL嘉泰姆	2JfL嘉泰姆	NJfL嘉泰姆	550JfL嘉泰姆
CXSD62105JfL嘉泰姆	TQFN4x4-24JfL嘉泰姆	COTJfL嘉泰姆	1JfL嘉泰姆	2JfL嘉泰姆	15JfL嘉泰姆	6JfL嘉泰姆	25JfL嘉泰姆	2JfL嘉泰姆	NJfL嘉泰姆	550JfL嘉泰姆
CXSD62106\|AJfL嘉泰姆	TQFN4x4-4JfL嘉泰姆 TQFN3x3-20JfL嘉泰姆	COTJfL嘉泰姆	1JfL嘉泰姆	2JfL嘉泰姆	20JfL嘉泰姆	3JfL嘉泰姆	28JfL嘉泰姆	0.75JfL嘉泰姆	5JfL嘉泰姆	800JfL嘉泰姆
CXSD62107JfL嘉泰姆	TQFN3x3-16JfL嘉泰姆	COTJfL嘉泰姆	1JfL嘉泰姆	1JfL嘉泰姆	20JfL嘉泰姆	1.8JfL嘉泰姆	28JfL嘉泰姆	0.75JfL嘉泰姆	5JfL嘉泰姆	400JfL嘉泰姆
CXSD62108JfL嘉泰姆	QFN3.5x3.5-14JfL嘉泰姆 TQFN3x3-16JfL嘉泰姆	COTJfL嘉泰姆	1JfL嘉泰姆	1JfL嘉泰姆	20JfL嘉泰姆	1.8JfL嘉泰姆	28JfL嘉泰姆	0.75JfL嘉泰姆	5JfL嘉泰姆	400JfL嘉泰姆
CXSD62109JfL嘉泰姆	TQFN3x3-16JfL嘉泰姆	COTJfL嘉泰姆	1JfL嘉泰姆	2JfL嘉泰姆	20JfL嘉泰姆	1.8JfL嘉泰姆	28JfL嘉泰姆	0.75JfL嘉泰姆	5JfL嘉泰姆	400JfL嘉泰姆
CXSD62110JfL嘉泰姆	QFN3x3-20JfL嘉泰姆 TQFN3x3-16JfL嘉泰姆	COTJfL嘉泰姆	1JfL嘉泰姆	2JfL嘉泰姆	20JfL嘉泰姆	3JfL嘉泰姆	28JfL嘉泰姆	1.8\|1.5\|0.5JfL嘉泰姆	5JfL嘉泰姆	740JfL嘉泰姆
CXSD62111JfL嘉泰姆	TQFN4x4-24JfL嘉泰姆 \|QFN3x3-20JfL嘉泰姆	CMJfL嘉泰姆	1JfL嘉泰姆	2JfL嘉泰姆	15JfL嘉泰姆	5JfL嘉泰姆	28JfL嘉泰姆	0.5JfL嘉泰姆	NJfL嘉泰姆	3000JfL嘉泰姆
CXSD62112JfL嘉泰姆	TDFN3x3-10JfL嘉泰姆	COTJfL嘉泰姆	1JfL嘉泰姆	1JfL嘉泰姆	20JfL嘉泰姆	1.8JfL嘉泰姆	28JfL嘉泰姆	0.5JfL嘉泰姆	5JfL嘉泰姆	250JfL嘉泰姆
CXSD62113\|CJfL嘉泰姆	TQFN3x3-20JfL嘉泰姆	COTJfL嘉泰姆	1JfL嘉泰姆	2JfL嘉泰姆	15JfL嘉泰姆	6JfL嘉泰姆	25JfL嘉泰姆	2JfL嘉泰姆	NJfL嘉泰姆	550JfL嘉泰姆
CXSD62113EJfL嘉泰姆	TQFN 3x3 20JfL嘉泰姆	COTJfL嘉泰姆	2JfL嘉泰姆	2JfL嘉泰姆	11JfL嘉泰姆	6JfL嘉泰姆	25JfL嘉泰姆	2JfL嘉泰姆	NJfL嘉泰姆	550JfL嘉泰姆
CXSD62114JfL嘉泰姆	TQFN3x3-20JfL嘉泰姆	COTJfL嘉泰姆	2JfL嘉泰姆	2JfL嘉泰姆	11JfL嘉泰姆	5.5JfL嘉泰姆	25JfL嘉泰姆	2JfL嘉泰姆	NJfL嘉泰姆	280JfL嘉泰姆
CXSD62115JfL嘉泰姆	QFN4x4-24JfL嘉泰姆	VMJfL嘉泰姆	2JfL嘉泰姆	1JfL嘉泰姆	60JfL嘉泰姆	3.1JfL嘉泰姆	13.2JfL嘉泰姆	0.85JfL嘉泰姆	12JfL嘉泰姆	5000JfL嘉泰姆
CXSD62116A\|B\|CJfL嘉泰姆	SOP-8PJfL嘉泰姆	VMJfL嘉泰姆	1JfL嘉泰姆	1JfL嘉泰姆	20JfL嘉泰姆	2.9JfL嘉泰姆	13.2JfL嘉泰姆	0.8JfL嘉泰姆	12JfL嘉泰姆	16000JfL嘉泰姆
CXSD62117JfL嘉泰姆	SOP-20JfL嘉泰姆	VMJfL嘉泰姆	2JfL嘉泰姆	2JfL嘉泰姆	30JfL嘉泰姆	10JfL嘉泰姆	13.2JfL嘉泰姆	1JfL嘉泰姆	12JfL嘉泰姆	5000JfL嘉泰姆
CXSD62118JfL嘉泰姆	TDFN3x3-10JfL嘉泰姆	COTJfL嘉泰姆	1JfL嘉泰姆	1JfL嘉泰姆	25JfL嘉泰姆	1.8JfL嘉泰姆	28JfL嘉泰姆	0.7JfL嘉泰姆	5JfL嘉泰姆	250JfL嘉泰姆
CXSD62119JfL嘉泰姆	TQFN3x3-20JfL嘉泰姆	COTJfL嘉泰姆	2JfL嘉泰姆	1JfL嘉泰姆	40JfL嘉泰姆	1.8JfL嘉泰姆	25JfL嘉泰姆	REFIN SettingJfL嘉泰姆	5JfL嘉泰姆	700JfL嘉泰姆
CXSD62120JfL嘉泰姆	QFN 3x3 20JfL嘉泰姆 TQFN 3x3 16JfL嘉泰姆	COTJfL嘉泰姆	1JfL嘉泰姆	2JfL嘉泰姆	20JfL嘉泰姆	3JfL嘉泰姆	28JfL嘉泰姆	1.8\|1.5 1.35\|1.2 0.5JfL嘉泰姆	5JfL嘉泰姆	800JfL嘉泰姆
CXSD62121AJfL嘉泰姆	TQFN3x3 20JfL嘉泰姆	COTJfL嘉泰姆	1JfL嘉泰姆	2JfL嘉泰姆	15JfL嘉泰姆	3JfL嘉泰姆	28JfL嘉泰姆	0.75JfL嘉泰姆	5JfL嘉泰姆	220JfL嘉泰姆
CXSD62121BJfL嘉泰姆	TQFN3x3 20JfL嘉泰姆	COTJfL嘉泰姆	1JfL嘉泰姆	2JfL嘉泰姆	15JfL嘉泰姆	3JfL嘉泰姆	28JfL嘉泰姆	0.75JfL嘉泰姆	5JfL嘉泰姆	220JfL嘉泰姆
CXSD62121JfL嘉泰姆	TQFN3x3-20JfL嘉泰姆	COTJfL嘉泰姆	1JfL嘉泰姆	2JfL嘉泰姆	20JfL嘉泰姆	3JfL嘉泰姆	28JfL嘉泰姆	0.75JfL嘉泰姆	5JfL嘉泰姆	180JfL嘉泰姆

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上一篇： CXSD6295 is a voltage mode, fixed 300kHz switching frequency, synchronous buck converter. CXSD6295 allows wide input voltage that is either a single 5~12V or two supply voltage(s) for vario

下一篇： CXSD6286 integrates PWM and linear controller, as well as the monitoring and protection functions into a single package. The synchronous PWM controller which drives dual N-channel MOSFETs, which

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CXSD6288 a dual-channel, constant on-time, and synchronous PWM controller which drives dual N-channel MOSFETs for each channel. CXSD6288 steps down high voltage of a battery to generate l

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