DG211BDJ Vishay, DG211BDJ Datasheet - Page 6

• Manufacturer Part Number: DG211BDJ
• Description: IC, ANALOG SWITCH, QUAD, SPST, DIP-16
• Manufacturer: Vishay
• Type: Analog Switchr

Specifications of DG211BDJ

• Analog Switch Type: SPST
• No. Of Channels: 4
• On State Resistance Max: 1ohm
• Turn Off Time: 200ns
• Turn On Time: 300ns
• Supply Voltage Range: 4.5V To 25V
• Operating Temperature Range: -40°C To +85°C
• Package: 16PDIP
• Maximum On Resistance: 160@12V Ohm
• Maximum High Level Output Current: 100 mA
• Maximum Turn-off Time: 200@±15V ns
• Maximum Turn-on Time: 300@±15V ns
• Switch Architecture: SPST
• Power Supply Type: Single|Dual
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Si9110/9111
Vishay Siliconix
DETAILED DESCRIPTION (CONT’D)
Applications which use a separate external reference, such as
non-isolated converter topologies and circuits employing
optical coupling in the feedback loop, do not require a trimmed
voltage
accommodates the requirements of these applications at a
lower cost, by leaving the reference voltage untrimmed. The
10% accurate reference thus provided is sufficient to establish
a dc bias point for the error amplifier.
Error Amplifier
Closed-loop regulation is provided by the error amplifier, which
is intended for use with “around-the-amplifier” compensation.
A MOS differential input stage provides for low input current.
The noninverting input to the error amplifier (V
connected to the output of the reference supply and should be
bypassed with a small capacitor to ground.
Oscillator Section
The oscillator consists of a ring of CMOS inverters, capacitors,
and a capacitor discharge switch. Frequency is set by an
external resistor between the OSC IN and OSC OUT pins.
(See Figure 5 for details of resistor value vs. frequency.) The
DISCHARGE pin should be tied to −V
oscillator operation. A frequency divider in the logic section
limits switch duty cycle to v 50% by locking the switching
frequency to one half of the oscillator frequency.
Remote synchronization is accomplished by capacitive
coupling of a positive SYNC pulse into the OSC IN (pin 8)
terminal. For a 5-V pulse amplitude and 0.5-ms pulse width,
typical values would be 100 pF in series with 3 kW to pin 8.
SHUTDOWN and RESET
SHUTDOWN (pin 11) and RESET (pin 12) are intended for
overriding the output MOSFET switch via external control
www.vishay.com
6
reference
with
1%
accuracy.
IN
for normal internal
REF
The
) is internally
Si9111
logic. The two inputs are fed through a latch preceding the
output switch. Depending on the logic state of RESET,
SHUTDOWN can be either a latched or unlatched input. The
output is off whenever SHUTDOWN is low. By simultaneously
having SHUTDOWN and RESET low, the latch is set and
SHUTDOWN has no effect until RESET goes high. The truth
table for these inputs is given in Table 1.
Table 1: Truth Table for the SHUTDOWN and RESET Pins
Both pins have internal current source pull-ups and should be
left disconnected when not in use. An added feature of the
current sources is the ability to connect a capacitor and an
open-collector driver to the SHUTDOWN or RESET pins to
provide variable shutdown time.
Output Driver
The push-pull driver output has a typical on-resistance of 20 W.
Maximum switching times are specified at 75 ns for a 500-pF
load. This is sufficient to directly drive MOSFETs such as the
2N7004, 2N7005, IRFD120 and IRFD220. Larger devices can
be driven, but switching times will be longer, resulting in higher
switching losses. In order to drive large MOSPOWER devices,
it is necessary to use an external driver IC, such as the
Vishay Siliconix D469A. The D469A can switch very large
devices such as the SMM20N50 (500 V, 0.3 W) in
approximately 100 ns.
SHUTDOWN
H
H
L
L
RESET
H
H
L
L
Normal Operation (No Change)
Off (Latched, No Change)
S-42037—Rev. H, 15-Nov-04
Normal Operation
Off (Not Latched)
Document Number: 70004
Off (Latched)
Output