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SBVS147 – SEPTEMBER 2010
VIN
DC/DC 1
DC/DC 2
HVM
Configuration
HVM1
HVM2
4CH Mode
VREG5
HVM3
HVM4
HVM2
(Ch3, Ch4,
Ch7, Ch8)
HVM1
(Ch1, Ch2,
Ch5, Ch6)
TLC5960
Channel 1
D1
HVM
Fault Detection
Driver Control
Phase Delay
HVM
Fault Detection
Driver Control
Driver
V
REF
Channel 2
G1
S1
D2
Driver
V
REF
Channel 3
G2
S2
D3
EN
CTRL1
PWM1
VIN
CTRL2
CTRL3
PWM2
CTRL4
PWM
Control Logic
CTRL1
(Ch1, Ch2,
Ch5, Ch6)
Phase Delay
HVM
Fault Detection
Driver Control
Phase Delay
Driver
V
REF
Channel 4
G3
S3
D4
CTRL2
(Ch3, Ch4,
Ch7, Ch8)
HVM
Fault Detection
Driver Control
Phase Delay
Driver
V
REF
Channel 5
G4
S4
D5
XFLT
XFLT
Buffer
HVM
Fault Detection
Driver Control
Phase Delay
Driver
V
REF
Channel 6
G5
S5
D6
VIN
VREG5
LDO
Regulator
HVM
Fault Detection
Driver Control
Phase Delay
Driver
V
REF
Channel 7
G6
S6
D7
Thermal
Shutdown
V
REF
HVM
Fault Detection
Driver Control
Phase Delay
HVM
Fault Detection
Driver Control
Driver
V
REF
Channel 8
G7
S7
D8
VADJ
0V to 1.4V
Analog
Input
Buffer
Driver
V
REF
G8
S8
GND
Phase Delay
Figure 2. Configuration with Two PWM Inputs and Two DC/DC Converters
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