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| 型号： | CAT4106YP-T2 |
| 厂商： | ON Semiconductor |
| 文件页数： | 9/15页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR 4CH BOOST 16TSSOP |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 汽车，背光，通用型 |
| 频率： | 700kHz ~ 1.3MHz |
| 电源电压： | 3 V ~ 5.5 V |
| 输出电压： | 36V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | CAT4106YP-T2OSDKR |
CAT4106
V FMIN
R6 + R7 * 1
V FMAX
R4 + R5 * 1
flagged. The VFMIN input circuitry consists of a
comparator referenced to 1.2 V. A typical value for resistor
R7 is around 20 k W . R6 can be calculated as follows:
1.2 V
If this detection feature is not needed, the VFMIN pin
must be tied to ground.
VFMAX pin uses a pair of external resistors (R4 & R5) to
program the worst case, maximum LED string forward
voltage (V FMAX ) expected in the specific application. If any
LED string fails to become regulated before the
programmed voltage is reached, the string will be
considered to contain LEDs which are open ? circuit and a
fault condition will be flagged. When an open ? circuit is
flagged, the individual channel that causes the open ? circuit
is internally flagged and subsequently ignored. In the event
that all channels are detected as being Open ? LED, the
Output Voltage (top LED Anode) will stabilize at the
VFMAX programmed voltage. The VFMAX input circuitry
consists of a comparator referenced to 1.2 V.
A typical value for resistor R5 is 20 k W . R4 can be
calculated as follows:
1.2 V
If this detection feature is not needed, the VFMAX pin
must be tied to ground.
FAULT is an open ? drain, active ? low, logic signal which
becomes active during an LED short ? circuit or open ? circuit
condition. The pin must be connected to a pull ? up resistor
of around 100 k W tied to VIN. The drive pull ? down
resistance (when active) is typically less than 100 W . The
diagnostic sequence used to determine a fault condition is
initiated when the device is first enabled.
PGND pin is the source connection terminal of the high
voltage CMOS power switch in the DC/DC converter. The
inductor supply bypass capacitor should be connected in
close proximity to the PGND pin. The return current from
PGND should be connected to the PCB ground plane.
GND is the ground reference pin for the device. All analog
control voltages are referenced to this pin. In addition, all
LED drive currents are conducted through the GND pin.
TAB is the thermal pad connection of the package and
should be connected to PCB ground plane.
Block Diagram
V L
L
D
SW
R5
VFMAX
R4
R6
R7
VFMIN
C3
LED
Cluster
N_Series
M_Parallel
LEDn
300 mV
OVP
Controller
Ctrl/Fault
Detector
FAULT
m C Diagnostics
1 MHz PWM
Controller
1A
1 W
CTRL
FB
R2
LED1
EN/SD
VIN
EN/DIM
Supply
PWM_DIM
System
Shutdown
Delay
Drive Control
IRSETx100
I1
I2
I3
I4
0 ? 175 mA
LED1
LED2
LED3
LED4
200 k W
R3
RSET
GND
PGND
R1
Figure 24. CAT4106 Simplified Functional Block Diagram
http://onsemi.com
9
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