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参数资料
| 型号： | DS3988T+T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 16/23页 |
| 文件大小： | 0K |
| 描述： | IC CCFL CNTRLR 8CH 48TQFP |
| 标准包装： | 2,000 |
| 类型： | CCFL 控制器 |
| 频率： | 40 ~ 80 kHz |
| 电流 - 电源： | 15mA |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 带卷 (TR) |
8-Channel Cold-Cathode
Fluorescent Lamp Controller
Detailed Register Descriptions
The DS3988 ’s Register Map is shown in Table 1.
Detailed register and bit descriptions follow in the sub-
Table 2. MOSFET Duty Cycle (MDC)
Codes for Soft-Start Settings
sequent tables.
Soft-Start Profile (SSPx) Registers —Each of the four
soft-start profile registers (SSP1–4) contains two 4-bit
codes that determine the MOSFET’s duty cycle (MDC)
for two clock cycles each (see Figure 6) at the begin-
ning of each DPWM burst. Table 2 shows the duty
cycles that correspond to each code. Selecting the
Most Recent Value instructs the DS3988 to use the
MOSFET duty cycle that was used for the last lamp
cycle of the previous burst.
MDC CODE (BINARY)*
X000
X001
X010
X011
X100
X101
X110
X111
MOSFET DUTY CYCLE
Fixed at 0%
Fixed at 3%
Fixed at 6%
Fixed at 9%
Fixed at 13%
Fixed at 16%
Fixed at 19%
Most Recent Value
* The most significant bit of each MDC code is ignored.
Table 1. Register Map
BYTE
ADDRESS
BYTE
NAME
FACTORY
DEFAULT*
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
F0h
F1h
F2h
F3h
SSP1
SSP2
SSP3
SSP4
21h
43h
65h
77h
MDC code for soft-start lamp cycles 3, 4
MDC code for soft-start lamp cycles 7, 8
MDC code for soft-start lamp cycles 11, 12
MDC code for soft-start lamp cycles 15, 16
MDC code for soft-start lamp cycles 1, 2
MDC code for soft-start lamp cycles 5, 6
MDC code for soft-start lamp cycles 9, 10
MDC code for soft-start lamp cycles 13, 14
F4h
F5h
CR1
CR2
00h
08h
DPD
LD2
FRS
LD1
ARD
LD0
RGSO
LSR1
DPSS
LSR0
LFSS
POSCR1
POSCS
POSCR0
LOC
UMWP
F6h
CR3
00h
Do not modify. If it has been modified, restore to all zeros.
F7h
F8-FFh
Reserved
User
Memory
—
00h
—
EE
—
EE
—
EE
—
EE
—
EE
—
EE
—
EE
—
EE
* All the configuration settings are saved in nonvolatile (EEPROM) memory.
16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS3991 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Cost CCFL Controller |
| DS3991V | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Cost CCFL Controller |
| DS3991VC | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Cost CCFL Controller |
| DS3991VR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Cost CCFL Controller |
| DS3991VRC | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Cost CCFL Controller |
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