HA16163T_08 RENESAS [Renesas Technology Corp], HA16163T_08 Datasheet - Page 12

• Manufacturer Part Number: HA16163T_08
• Description: Synchronous Phase Shift Full-Bridge Control IC
• Manufacturer: RENESAS [Renesas Technology Corp]

HA16163T
The remote on and off threshold voltages are provided with hysteresis of 84 mV (typ). Remote control can be
performed by means of analog input as shown in the diagram below as well as by means of logic control. The
following diagram shows an example in which the power supply set input voltage is sensed by means of the REMOTE
pin, and the power supply set start-up voltage is set to 34 V, and the shutdown voltage to 32 V.
Start-up Counter
When the VREFGOOD signal (internal signal) goes to the logic low level, the HA16163 starts operating as a controller.
The VREFGOOD signal is created from the REMOTE comparator and VREFGOOD circuit output via a 32-clock start-
up counter.
Therefore, the start of IC operation is a 32-count later than UVLO release or the remote on trigger. When the oscillator
frequency is set to 1 MHz, this represents a delay of 32 μs. This delay enables operation to be halted until VREF (5 V)
stabilizes when UVLO is released. Note that the start-up counter operates when VREF rises or when a remote on
operation is performed, but does not operate when VREF falls or when a remote off operation is performed (there is no
logic delay due to the start-up counter).
REJ03F0001-0600 Rev.6.00 Jul 01, 2008
Page 12 of 29
REMOTE
VIN(on) = VON(remote) × (R1+R2)/R2
VIN(off) = VOFF(remote) × (R1+R2)/R2
= 1.417V × 24
= 34.008V
= 1.333V × 24
= 31.992V
OFF: 1.333V
ON: 1.417V
VCC
VREF
RES
(Internal signal)
VREFGOOD
(Internal signal)
H
+
−
L
VIN
Remote control circuit
VCC
(logic input)
5V(VREF)
UVLO
From Oscillator
9.8V
4.6V
R1
R2
UVL
VIN sense circuit
(analog input)
220k
10k
10k
Figure 3
Figure 4
Figure 5
Start-up
counter
32 clock
32 counts
100p
REMOTE
HA16163
5V
Generator
GND
VREFGOOD
Start of
operation
Full-bridge
control
7.9V
VREF
GOOD
Operation
halted
4.4V
H
L
Power Stage
Circuit Bias
VREF