HD70402Q
Automotive Dual-Channel 40mΩ Smart High-Side Driver
© 2023 AnalogySemi Ltd. All Rights Reserved. www.analogysemi.com | Page 1 of 29
1. FEATURES
• Compliant with AEC-Q100 Grade 1
• Dual-channel high-side driver with integrated
current sense feedback
• Operation voltage range: 4V to 28V, AMR 40V
• On resistance:
32.2mΩ (Typ, T
J
= 25°C)
65.0mΩ (Max, T
J
= 150°C)
• Load current I
L(NOM)
: 3A (Typ)
• Maximum overcurrent limit: 20A (Typ)
• Very low standby current consumption: 0.1µA
(Max)
• Support down to 2.85V V
CC
during deep cold
crank
• 3V/5V CMOS compatible input
• Multiple diagnostics through CS pin
High accuracy analog output
proportional to loading current
Overload and output short to ground
alarm
Open load diagnostic in OFF state
Output short to V
CC
detection
Support CS output enable/disable
• Protections
V
CC
undervoltage shutdown
V
DS
clamp for protection of inductive load
Thermal shutdown
Overcurrent protection
Dynamic overtemperature protection
Output latch/auto-retry mode
configurable via the FaultRST pin
Loss of ground and loss of V
CC
protection
Battery reverse insertion protection
ESD protection
• Packages: SSOP16PP and SSOP14PP
2. APPLICATIONS
• All types of automotive resistive, inductive,
and capacitive loads
• Power supply protection in ADAS: radar and
sensors
• Automotive headlamps
3. DESCRIPTION
The HD70402Q is an automotive dual-channel
smart high-side driver. It features 3V/5V CMOS
compatible input control interface and two
independent output channels. It can also provide
smart protections and diagnostics. The HD70402Q
is extensively used in 12V automotive power
supply systems.
The HD70402Q integrates advanced protection
functions, including overcurrent limit protection,
and dynamic overtemperature protection.
Additionally, HD70402QASSOP16P provides con-
figurable output latch/auto-retry function though
the FaultRST pin when thermal shutdown or over-
current event occurs.
The HD70402Q also integrates a multiplexed
analog output through the CS pin to provide
complex diagnostic functions, including accurate
analog output proportional to loading current,
overload and output short to ground alarms,
output short to V
CC
, and open load detection in
OFF state.
The HD70402Q SEn pin provides the function of
enable/disable of diagnostic functions, which can
be used to obtain low power consumption if
disabled. When multiple HD70402Q devices are
used in one system, MCU can achieve sampling
of CS voltage through one single ADC channel by
connecting CS outputs of multiple HD70402Q
devices together. This greatly reduces system cost.
The HD70402Q supports the SSOP16PP and
SSOP14PP packages. See Table 1 for the order
information.
HD70402Q
Automotive Dual-Channel 40mΩ Smart High-Side Driver
Page 2 of 29 | www.analogysemi.com © 2023 AnalogySemi Ltd. All Rights Reserved.
Table 1. Order Information
ORDER NUMBER
PACKAGE
MARK
CH
(#)
V
CC
(V)
Rdson
(mΩ)
K
2
I
Limit
(A)
RATING
PKG.
OPTION
HD70402QASSOP16P
SSOP16PP
HD70402Q
XXXXXX
2
4-28
32.2
1340
20
Auto
T/R-3000
HD70402QASSOP14P
SSOP14PP
HD70402Q
XXXXXX
2
4-28
32.2
1340
20
Auto
T/R-3000
Note: “XXXXXX” for internal use.
Devices can be ordered via the following two ways:
1. Place orders directly on our website (www.analogysemi.com), or;
2. Contact our sales team by mailing to sales@analogysemi.com.